From ffdb280a2711d238e3e353f8a050a55f912abb34 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@Germany>
Date: Tue, 27 Jan 2009 23:03:21 +0100
Subject: [PATCH] reworked surfMesh and PrimitivePatchExtra

- ditched PrimitivePatchExtra in favour of a PatchTools class that is
  currently just a collection of static functions. They could equally well
  live within PrimitivePatch itself, but isolated also has its advantages.

- MeshedSurface, UnsortedMeshedSurface now have 'regions' instead of
  'patches' since they are more like a faceZone for meshed surfaces than
  patches. This might avoid confusion at a later stage.
---
 .../surfaceMeshConvert/surfaceMeshConvert.C   |   9 +-
 .../constraint/cyclic/cyclicPolyPatch.H       |   2 -
 .../PrimitivePatch/PrimitivePatch.C           | 136 ++++++---
 .../PrimitivePatch/PrimitivePatch.H           | 289 +++++++++---------
 .../PrimitivePatch/PrimitivePatchAddressing.C |  15 +-
 .../PrimitivePatch/PrimitivePatchBdryPoints.C |  14 +-
 .../PrimitivePatch/PrimitivePatchCheck.C      |  30 +-
 .../PrimitivePatch/PrimitivePatchClear.C      |  30 +-
 .../PrimitivePatch/PrimitivePatchEdgeLoops.C  |  20 +-
 .../PrimitivePatchLocalPointOrder.C           |  16 +-
 .../PrimitivePatch/PrimitivePatchMeshData.C   |  31 +-
 .../PrimitivePatch/PrimitivePatchMeshEdges.C  |  24 +-
 .../PrimitivePatchPointAddressing.C           |  18 +-
 .../PrimitivePatchProjectPoints.C             |  33 +-
 .../PrimitivePatchExtra/PrimitivePatchExtra.C | 173 -----------
 .../PrimitivePatchExtra/PrimitivePatchExtra.H | 205 -------------
 .../PrimitivePatchExtraAddressing.C           | 218 -------------
 .../PrimitivePatchExtraCleanup.C              | 239 ---------------
 .../PrimitivePatchTools/PrimitivePatchTools.C |  37 +++
 .../PrimitivePatchTools/PrimitivePatchTools.H | 181 +++++++++++
 .../PrimitivePatchToolsCheck.C                | 180 +++++++++++
 .../PrimitivePatchToolsEdgeOwner.C            |  95 ++++++
 .../PrimitivePatchToolsSearch.C}              | 119 ++++----
 .../PrimitivePatchToolsSortEdges.C            | 128 ++++++++
 .../BasicMeshedSurface/BasicMeshedSurface.C   |   3 +-
 .../BasicMeshedSurface/BasicMeshedSurface.H   |   9 +-
 src/surfMesh/Make/files                       |   6 +-
 src/surfMesh/MeshedSurface/MeshedSurface.C    | 248 +++++++--------
 src/surfMesh/MeshedSurface/MeshedSurface.H    |  54 ++--
 src/surfMesh/MeshedSurface/MeshedSurfaceIO.C  |  22 +-
 .../UnsortedMeshedSurface.C                   | 165 +++++-----
 .../UnsortedMeshedSurface.H                   |  82 ++---
 .../UnsortedMeshedSurfaceIO.C                 |  14 +-
 .../surfRegion/surfRegion.C}                  |  68 ++---
 .../surfRegion/surfRegion.H}                  |  67 ++--
 .../surfRegion/surfRegionIOList.C}            |  56 ++--
 .../surfRegion/surfRegionIOList.H}            |  32 +-
 .../surfRegion/surfRegionList.H}              |  11 +-
 .../surfRegionIdentifier.C}                   |  30 +-
 .../surfRegionIdentifier.H}                   |  62 ++--
 .../surfRegionIdentifierList.H}               |  10 +-
 .../surfaceFormats/ac3d/AC3DsurfaceFormat.C   | 102 +++----
 .../surfaceFormats/ac3d/AC3DsurfaceFormat.H   |   2 +-
 .../ac3d/AC3DsurfaceFormatCore.C              |  16 +-
 .../ac3d/AC3DsurfaceFormatCore.H              |   4 +-
 .../surfaceFormats/ftr/FTRsurfaceFormat.C     |  32 +-
 .../surfaceFormats/gts/GTSsurfaceFormat.C     |  65 ++--
 .../surfaceFormats/gts/GTSsurfaceFormat.H     |   2 +-
 .../surfaceFormats/nas/NASsurfaceFormat.C     |  26 +-
 .../surfaceFormats/nas/NASsurfaceFormat.H     |   2 +-
 .../surfaceFormats/nas/NASsurfaceFormatCore.C |   2 +-
 .../surfaceFormats/obj/OBJsurfaceFormat.C     |  34 +--
 .../surfaceFormats/obj/OBJsurfaceFormat.H     |   8 -
 .../surfaceFormats/obj/OBJsurfaceFormatCore.C |  12 +-
 .../surfaceFormats/obj/OBJsurfaceFormatCore.H |   2 +-
 .../surfaceFormats/off/OFFsurfaceFormat.C     |  30 +-
 .../surfaceFormats/off/OFFsurfaceFormat.H     |   8 -
 .../surfaceFormats/off/OFFsurfaceFormatCore.C |  12 +-
 .../surfaceFormats/off/OFFsurfaceFormatCore.H |   2 +-
 .../surfaceFormats/smesh/SMESHsurfaceFormat.C |  16 +-
 .../starcd/STARCDsurfaceFormat.C              |  37 ++-
 .../starcd/STARCDsurfaceFormatCore.C          |   9 +-
 .../starcd/STARCDsurfaceFormatCore.H          |   2 +-
 .../surfaceFormats/stl/STLsurfaceFormat.C     |  64 ++--
 .../surfaceFormats/stl/STLsurfaceFormat.H     |   2 +-
 .../stl/STLsurfaceFormatASCII.L               |   2 +-
 .../surfaceFormats/stl/STLsurfaceFormatCore.C |   8 +-
 .../surfaceFormats/stl/STLsurfaceFormatCore.H |  10 +-
 .../surfaceFormats/surfaceFormatsCore.C       |  82 ++---
 .../surfaceFormats/surfaceFormatsCore.H       |  17 +-
 .../surfaceFormats/tri/TRIsurfaceFormat.C     |  36 +--
 .../surfaceFormats/tri/TRIsurfaceFormat.H     |   2 +-
 .../surfaceFormats/tri/TRIsurfaceFormatCore.C |  26 +-
 .../surfaceFormats/tri/TRIsurfaceFormatCore.H |   8 +-
 .../surfaceFormats/vtk/VTKsurfaceFormat.C     |  14 +-
 .../surfaceFormats/vtk/VTKsurfaceFormat.H     |   4 +-
 .../surfaceFormats/vtk/VTKsurfaceFormatCore.C |  44 +--
 .../surfaceFormats/vtk/VTKsurfaceFormatCore.H |   8 +-
 78 files changed, 1847 insertions(+), 2086 deletions(-)
 delete mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.C
 delete mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.H
 delete mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraAddressing.C
 delete mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraCleanup.C
 create mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.C
 create mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.H
 create mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsCheck.C
 create mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsEdgeOwner.C
 rename src/OpenFOAM/meshes/primitiveMesh/{PrimitivePatchExtra/PrimitivePatchExtraSearch.C => PrimitivePatchTools/PrimitivePatchToolsSearch.C} (66%)
 create mode 100644 src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSortEdges.C
 rename src/surfMesh/{surfGroup/surfGroup.C => surfRegion/surfRegion/surfRegion.C} (65%)
 rename src/surfMesh/{surfGroup/surfGroup.H => surfRegion/surfRegion/surfRegion.H} (69%)
 rename src/surfMesh/{surfGroup/surfGroupIOList.C => surfRegion/surfRegion/surfRegionIOList.C} (72%)
 rename src/surfMesh/{surfGroup/surfGroupIOList.H => surfRegion/surfRegion/surfRegionIOList.H} (79%)
 rename src/surfMesh/{surfGroup/surfGroupList.H => surfRegion/surfRegion/surfRegionList.H} (90%)
 rename src/surfMesh/{surfPatchIdentifier/surfPatchIdentifier.C => surfRegion/surfRegionIdentifier/surfRegionIdentifier.C} (78%)
 rename src/surfMesh/{surfPatchIdentifier/surfPatchIdentifier.H => surfRegion/surfRegionIdentifier/surfRegionIdentifier.H} (67%)
 rename src/surfMesh/{surfPatchIdentifier/surfPatchIdentifierList.H => surfRegion/surfRegionIdentifier/surfRegionIdentifierList.H} (89%)

diff --git a/applications/utilities/surface/surfaceMeshConvert/surfaceMeshConvert.C b/applications/utilities/surface/surfaceMeshConvert/surfaceMeshConvert.C
index 65d62f4b67..9b5c2cb8f7 100644
--- a/applications/utilities/surface/surfaceMeshConvert/surfaceMeshConvert.C
+++ b/applications/utilities/surface/surfaceMeshConvert/surfaceMeshConvert.C
@@ -56,6 +56,7 @@ Note
 #include "Time.H"
 #include "polyMesh.H"
 #include "triSurface.H"
+#include "PackedBoolList.H"
 
 #include "MeshedSurfaces.H"
 #include "UnsortedMeshedSurfaces.H"
@@ -115,7 +116,7 @@ int main(int argc, char *argv[])
         if (args.options().found("orient"))
         {
             Info<< "Checking surface orientation" << endl;
-            surf.checkOrientation(true);
+            PatchTools::checkOrientation(surf, true);
             Info<< endl;
         }
 
@@ -154,7 +155,7 @@ int main(int argc, char *argv[])
         if (args.options().found("orient"))
         {
             Info<< "Checking surface orientation" << endl;
-            surf.checkOrientation(true);
+            PatchTools::checkOrientation(surf, true);
             Info<< endl;
         }
 
@@ -192,7 +193,7 @@ int main(int argc, char *argv[])
         if (args.options().found("orient"))
         {
             Info<< "Checking surface orientation" << endl;
-            surf.checkOrientation(true);
+            PatchTools::checkOrientation(surf, true);
             Info<< endl;
         }
 
@@ -230,7 +231,7 @@ int main(int argc, char *argv[])
         if (args.options().found("orient"))
         {
             Info<< "Checking surface orientation" << endl;
-            surf.checkOrientation(true);
+            PatchTools::checkOrientation(surf, true);
             Info<< endl;
         }
 
diff --git a/src/OpenFOAM/meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.H b/src/OpenFOAM/meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.H
index 5b349a4a75..8bd2bff42f 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.H
+++ b/src/OpenFOAM/meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.H
@@ -60,8 +60,6 @@ SourceFiles
 namespace Foam
 {
 
-class patchZones;
-
 /*---------------------------------------------------------------------------*\
                       Class cyclicPolyPatch Declaration
 \*---------------------------------------------------------------------------*/
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.C
index 2b05c73ae8..6be9ef348b 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.C
@@ -26,11 +26,6 @@ License
 
 #include "Map.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 // Construct from components
@@ -41,7 +36,9 @@ template
     class PointField,
     class PointType
 >
-PrimitivePatch<Face, FaceList, PointField, PointType>::PrimitivePatch
+
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+PrimitivePatch
 (
     const FaceList<Face>& faces,
     const Field<PointType>& points
@@ -76,7 +73,9 @@ template
     class PointField,
     class PointType
 >
-PrimitivePatch<Face, FaceList, PointField, PointType>::PrimitivePatch
+
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+PrimitivePatch
 (
     FaceList<Face>& faces,
     Field<PointType>& points,
@@ -112,7 +111,9 @@ template
     class PointField,
     class PointType
 >
-PrimitivePatch<Face, FaceList, PointField, PointType>::PrimitivePatch
+
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+PrimitivePatch
 (
     const PrimitivePatch<Face, FaceList, PointField, PointType>& pp
 )
@@ -148,7 +149,8 @@ template
     class PointField,
     class PointType
 >
-PrimitivePatch<Face, FaceList, PointField, PointType>::~PrimitivePatch()
+
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::~PrimitivePatch()
 {
     clearOut();
 }
@@ -164,7 +166,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::movePoints
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+movePoints
 (
     const Field<PointType>&
 )
@@ -188,8 +193,10 @@ template
     class PointField,
     class PointType
 >
-const edgeList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::edges() const
+
+const Foam::edgeList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+edges() const
 {
     if (!edgesPtr_)
     {
@@ -207,8 +214,10 @@ template
     class PointField,
     class PointType
 >
-label PrimitivePatch<Face, FaceList, PointField, PointType>::nInternalEdges()
- const
+
+Foam::label
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+nInternalEdges() const
 {
     if (!edgesPtr_)
     {
@@ -226,8 +235,10 @@ template
     class PointField,
     class PointType
 >
-const labelList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::boundaryPoints() const
+
+const Foam::labelList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+boundaryPoints() const
 {
     if (!boundaryPointsPtr_)
     {
@@ -245,8 +256,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::faceFaces() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+faceFaces() const
 {
     if (!faceFacesPtr_)
     {
@@ -264,8 +277,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::edgeFaces() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+edgeFaces() const
 {
     if (!edgeFacesPtr_)
     {
@@ -283,8 +298,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::faceEdges() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+faceEdges() const
 {
     if (!faceEdgesPtr_)
     {
@@ -302,8 +319,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::pointEdges() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+pointEdges() const
 {
     if (!pointEdgesPtr_)
     {
@@ -321,8 +340,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::pointFaces() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+pointFaces() const
 {
     if (!pointFacesPtr_)
     {
@@ -340,8 +361,10 @@ template
     class PointField,
     class PointType
 >
-const List<Face>&
-PrimitivePatch<Face, FaceList, PointField, PointType>::localFaces() const
+
+const Foam::List<Face>&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+localFaces() const
 {
     if (!localFacesPtr_)
     {
@@ -359,8 +382,10 @@ template
     class PointField,
     class PointType
 >
-const labelList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::meshPoints() const
+
+const Foam::labelList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+meshPoints() const
 {
     if (!meshPointsPtr_)
     {
@@ -378,8 +403,10 @@ template
     class PointField,
     class PointType
 >
-const Map<label>&
-PrimitivePatch<Face, FaceList, PointField, PointType>::meshPointMap() const
+
+const Foam::Map<Foam::label>&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+meshPointMap() const
 {
     if (!meshPointMapPtr_)
     {
@@ -397,8 +424,10 @@ template
     class PointField,
     class PointType
 >
-const Field<PointType>&
-PrimitivePatch<Face, FaceList, PointField, PointType>::localPoints() const
+
+const Foam::Field<PointType>&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+localPoints() const
 {
     if (!localPointsPtr_)
     {
@@ -416,8 +445,10 @@ template
     class PointField,
     class PointType
 >
-const labelList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::localPointOrder() const
+
+const Foam::labelList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+localPointOrder() const
 {
     if (!localPointOrderPtr_)
     {
@@ -435,16 +466,19 @@ template
     class PointField,
     class PointType
 >
-label PrimitivePatch<Face, FaceList, PointField, PointType>::whichPoint
+
+Foam::label
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+whichPoint
 (
     const label gp
 ) const
 {
-    Map<label>::const_iterator gpIter = meshPointMap().find(gp);
+    Map<label>::const_iterator fnd = meshPointMap().find(gp);
 
-    if (gpIter != meshPointMap().end())
+    if (fnd != meshPointMap().end())
     {
-        return gpIter();
+        return fnd();
     }
     else
     {
@@ -461,8 +495,10 @@ template
     class PointField,
     class PointType
 >
-const Field<PointType>&
-PrimitivePatch<Face, FaceList, PointField, PointType>::faceNormals() const
+
+const Foam::Field<PointType>&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+faceNormals() const
 {
     if (!faceNormalsPtr_)
     {
@@ -480,8 +516,10 @@ template
     class PointField,
     class PointType
 >
-const Field<PointType>&
-PrimitivePatch<Face, FaceList, PointField, PointType>::pointNormals() const
+
+const Foam::Field<PointType>&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+pointNormals() const
 {
     if (!pointNormalsPtr_)
     {
@@ -501,7 +539,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::operator=
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+operator=
 (
     const PrimitivePatch<Face, FaceList, PointField, PointType>& pp
 )
@@ -511,11 +552,6 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::operator=
     FaceList<Face>::operator=(pp);
 }
 
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 #include "PrimitivePatchAddressing.C"
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.H b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.H
index 92ce43b73c..f0bd005b47 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.H
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatch.H
@@ -28,10 +28,10 @@ Class
 Description
     A list of faces which address into the list of points.
 
-    The class is templated on the form of the face (e.g. triangle, polygon
-    etc.) and on the form of list for faces and points so that it can
-    refer to existing lists using UList and const pointField& or hold the
-    storage using List and pointField.
+    The class is templated on the face type (e.g. triangle, polygon etc.)
+    and on the list type of faces and points so that it can refer to
+    existing lists using UList and const pointField& or hold the storage
+    using List and pointField.
 
 SourceFiles
     PrimitivePatchAddressing.C
@@ -211,9 +211,12 @@ private:
         //- Calculate unit point normals
         void calcPointNormals() const;
 
+        //- Calculate edge owner
+        void calcEdgeOwner() const;
+
 
         //- Face-edge-face walk while remaining on a patch point.
-        // Used to determine if surface multiply connected through point.
+        //  Used to determine if surface multiply connected through point.
         void visitPointRegion
         (
             const label pointI,
@@ -265,175 +268,175 @@ public:
 
     // Member Functions
 
-        // Access
+    // Access
 
-            //- Return reference to global points
-            const Field<PointType>& points() const
+        //- Return reference to global points
+        const Field<PointType>& points() const
+        {
+            return points_;
+        }
+
+
+    // Access functions for demand driven data
+
+        // Topological data; no mesh required.
+
+            //- Return number of points supporting patch faces
+            label nPoints() const
             {
-                return points_;
+                return meshPoints().size();
             }
 
+            //- Return number of edges in patch
+            label nEdges() const
+            {
+                return edges().size();
+            }
 
-        // Access functions for demand driven data
+            //- Return list of edges, address into LOCAL point list
+            const edgeList& edges() const;
 
-            // Topological data; no mesh required.
+            //- Number of internal edges
+            label nInternalEdges() const;
 
-                //- Return number of points supporting patch faces
-                label nPoints() const
-                {
-                    return meshPoints().size();
-                }
+            //- Is internal edge?
+            bool isInternalEdge(const label edgeI) const
+            {
+                return edgeI < nInternalEdges();
+            }
 
-                //- Return number of edges in patch
-                label nEdges() const
-                {
-                    return edges().size();
-                }
+            //- Return list of boundary points,
+            //  address into LOCAL point list
+            const labelList& boundaryPoints() const;
 
-                //- Return list of edges, address into LOCAL point list
-                const edgeList& edges() const;
+            //- Return face-face addressing
+            const labelListList& faceFaces() const;
 
-                //- Number of internal edges
-                label nInternalEdges() const;
+            //- Return edge-face addressing
+            const labelListList& edgeFaces() const;
 
-                //- Is internal edge?
-                bool isInternalEdge(const label edgeI) const
-                {
-                    return edgeI < nInternalEdges();
-                }
+            //- Return face-edge addressing
+            const labelListList& faceEdges() const;
 
-                //- Return list of boundary points,
-                //  address into LOCAL point list
-                const labelList& boundaryPoints() const;
+            //- Return point-edge addressing
+            const labelListList& pointEdges() const;
 
-                //- Return face-face addressing
-                const labelListList& faceFaces() const;
+            //- Return point-face addressing
+            const labelListList& pointFaces() const;
 
-                //- Return edge-face addressing
-                const labelListList& edgeFaces() const;
-
-                //- Return face-edge addressing
-                const labelListList& faceEdges() const;
-
-                //- Return point-edge addressing
-                const labelListList& pointEdges() const;
-
-                //- Return point-face addressing
-                const labelListList& pointFaces() const;
-
-                //- Return patch faces addressing into local point list
-                const List<Face>& localFaces() const;
+            //- Return patch faces addressing into local point list
+            const List<Face>& localFaces() const;
 
 
-            // Addressing into mesh
+        // Addressing into mesh
 
-                //- Return labelList of mesh points in patch
-                const labelList& meshPoints() const;
+            //- Return labelList of mesh points in patch
+            const labelList& meshPoints() const;
 
-                //- Mesh point map.  Given the global point index find its
-                //  location in the patch
-                const Map<label>& meshPointMap() const;
+            //- Mesh point map.  Given the global point index find its
+            //  location in the patch
+            const Map<label>& meshPointMap() const;
 
-                //- Return pointField of points in patch
-                const Field<PointType>& localPoints() const;
+            //- Return pointField of points in patch
+            const Field<PointType>& localPoints() const;
 
-                //- Return orders the local points for most efficient search
-                const labelList& localPointOrder() const;
+            //- Return orders the local points for most efficient search
+            const labelList& localPointOrder() const;
 
-                //- Given a global point index, return the local point
-                //index.  If the point is not found, return -1
-                label whichPoint(const label gp) const;
+            //- Given a global point index, return the local point index.
+            //  If the point is not found, return -1
+            label whichPoint(const label gp) const;
 
-                //- Given an edge in local point labels, return its
-                //  index in the edge list.  If the edge is not found, return -1
-                label whichEdge(const edge& e) const;
+            //- Given an edge in local point labels, return its
+            //  index in the edge list.  If the edge is not found, return -1
+            label whichEdge(const edge&) const;
 
-                //- Return labels of patch edges in the global edge list using
-                //  cell addressing
-                labelList meshEdges
-                (
-                    const edgeList& allEdges,
-                    const labelListList& cellEdges,
-                    const labelList& faceCells
-                ) const;
-
-                //- Return labels of patch edges in the global edge list using
-                //  basic edge addressing.
-                labelList meshEdges
-                (
-                    const edgeList& allEdges,
-                    const labelListList& pointEdges
-                ) const;
-
-                //- Return face normals for patch
-                const Field<PointType>& faceNormals() const;
-
-                //- Return point normals for patch
-                const Field<PointType>& pointNormals() const;
-
-
-            // Other patch operations
-
-                //- Project vertices of patch onto another patch
-                template <class ToPatch>
-                List<objectHit> projectPoints
-                (
-                    const ToPatch& targetPatch,
-                    const Field<PointType>& projectionDirection,
-                    const intersection::algorithm alg = intersection::FULL_RAY,
-                    const intersection::direction dir = intersection::VECTOR
-                ) const;
-
-                //- Project vertices of patch onto another patch
-                template <class ToPatch>
-                List<objectHit> projectFaceCentres
-                (
-                    const ToPatch& targetPatch,
-                    const Field<PointType>& projectionDirection,
-                    const intersection::algorithm alg = intersection::FULL_RAY,
-                    const intersection::direction dir = intersection::VECTOR
-                ) const;
-
-                //- Return list of closed loops of boundary vertices.
-                //  Edge loops are given as ordered lists of vertices
-                //  in local addressing
-                const labelListList& edgeLoops() const;
-
-
-        // Check
-
-            //- Calculate surface type formed by patch.
-            //  - all edges have two neighbours (manifold)
-            //  - some edges have more than two neighbours (illegal)
-            //  - other (open)
-            surfaceTopo surfaceType() const;
-
-            //- Check surface formed by patch for manifoldness (see above).
-            //  Insert vertices of incorrect
-            //  edges set. Return true if any incorrect edge found.
-            bool checkTopology
+            //- Return labels of patch edges in the global edge list using
+            //  cell addressing
+            labelList meshEdges
             (
-                const bool report = false,
-                labelHashSet* setPtr = NULL
+                const edgeList& allEdges,
+                const labelListList& cellEdges,
+                const labelList& faceCells
             ) const;
 
-            //- Checks primitivePatch for faces sharing point but not edge.
-            //  This denotes a surface that is pinched at a single point
-            //  (test for pinched at single edge is already in PrimitivePatch)
-            //  Returns true if this situation found and puts conflicting
-            // (mesh)point in set. Based on all the checking routines in
-            // primitiveMesh.
-            bool checkPointManifold
+            //- Return labels of patch edges in the global edge list using
+            //  basic edge addressing.
+            labelList meshEdges
             (
-                const bool report = false,
-                labelHashSet* setPtr = NULL
+                const edgeList& allEdges,
+                const labelListList& pointEdges
             ) const;
 
+            //- Return face normals for patch
+            const Field<PointType>& faceNormals() const;
 
-        // Edit
+            //- Return point normals for patch
+            const Field<PointType>& pointNormals() const;
 
-            //- Correct patch after moving points
-            virtual void movePoints(const Field<PointType>&);
+
+        // Other patch operations
+
+            //- Project vertices of patch onto another patch
+            template <class ToPatch>
+            List<objectHit> projectPoints
+            (
+                const ToPatch& targetPatch,
+                const Field<PointType>& projectionDirection,
+                const intersection::algorithm = intersection::FULL_RAY,
+                const intersection::direction = intersection::VECTOR
+            ) const;
+
+            //- Project vertices of patch onto another patch
+            template <class ToPatch>
+            List<objectHit> projectFaceCentres
+            (
+                const ToPatch& targetPatch,
+                const Field<PointType>& projectionDirection,
+                const intersection::algorithm = intersection::FULL_RAY,
+                const intersection::direction = intersection::VECTOR
+            ) const;
+
+            //- Return list of closed loops of boundary vertices.
+            //  Edge loops are given as ordered lists of vertices
+            //  in local addressing
+            const labelListList& edgeLoops() const;
+
+
+    // Check
+
+        //- Calculate surface type formed by patch.
+        //  - all edges have two neighbours (manifold)
+        //  - some edges have more than two neighbours (illegal)
+        //  - other (open)
+        surfaceTopo surfaceType() const;
+
+        //- Check surface formed by patch for manifoldness (see above).
+        //  Return true if any incorrect edges are found.
+        //  Insert vertices of incorrect edges into set.
+        bool checkTopology
+        (
+            const bool report = false,
+            labelHashSet* setPtr = NULL
+        ) const;
+
+        //- Checks primitivePatch for faces sharing point but not edge.
+        //  This denotes a surface that is pinched at a single point
+        //  (test for pinched at single edge is already in PrimitivePatch)
+        //  Returns true if this situation found and puts conflicting
+        //  (mesh)point in set. Based on all the checking routines in
+        //  primitiveMesh.
+        bool checkPointManifold
+        (
+            const bool report = false,
+            labelHashSet* setPtr = NULL
+        ) const;
+
+
+    // Edit
+
+        //- Correct patch after moving points
+        virtual void movePoints(const Field<PointType>&);
 
 
     // Member operators
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchAddressing.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchAddressing.C
index 4fcf243dd5..14d91344d1 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchAddressing.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchAddressing.C
@@ -39,11 +39,6 @@ Description
 #include "DynamicList.H"
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
 template
@@ -53,8 +48,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcAddressing()
- const
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcAddressing() const
 {
     if (debug)
     {
@@ -311,8 +308,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcAddressing()
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchBdryPoints.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchBdryPoints.C
index 43638ad5a2..fbd309d2cf 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchBdryPoints.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchBdryPoints.C
@@ -29,10 +29,6 @@ Description
 #include "PrimitivePatch.H"
 #include "HashSet.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -43,8 +39,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcBdryPoints()
- const
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcBdryPoints() const
 {
     if (debug)
     {
@@ -91,8 +89,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcBdryPoints()
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchCheck.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchCheck.C
index 87e4383e83..172bc9db7e 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchCheck.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchCheck.C
@@ -31,10 +31,6 @@ Description
 #include "Map.H"
 #include "ListOps.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -45,7 +41,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::visitPointRegion
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+visitPointRegion
 (
     const label pointI,
     const labelList& pFaces,
@@ -121,8 +120,10 @@ template
     class PointField,
     class PointType
 >
-typename PrimitivePatch<Face, FaceList, PointField, PointType>::surfaceTopo
-PrimitivePatch<Face, FaceList, PointField, PointType>::surfaceType() const
+
+typename Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::surfaceTopo
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+surfaceType() const
 {
     if (debug)
     {
@@ -173,7 +174,10 @@ template
     class PointField,
     class PointType
 >
-bool PrimitivePatch<Face, FaceList, PointField, PointType>::checkTopology
+
+bool
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+checkTopology
 (
     const bool report,
     labelHashSet* setPtr
@@ -241,8 +245,10 @@ template
     class PointField,
     class PointType
 >
+
 bool
-PrimitivePatch<Face, FaceList, PointField, PointType>::checkPointManifold
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+checkPointManifold
 (
     const bool report,
     labelHashSet* setPtr
@@ -327,12 +333,8 @@ PrimitivePatch<Face, FaceList, PointField, PointType>::checkPointManifold
         }
     }
 
-    return foundError; 
+    return foundError;
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchClear.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchClear.C
index cc3a5332a5..160bf5546f 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchClear.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchClear.C
@@ -29,10 +29,6 @@ Description
 #include "PrimitivePatch.H"
 #include "demandDrivenData.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
@@ -43,7 +39,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::clearGeom()
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+clearGeom()
 {
     if (debug)
     {
@@ -65,7 +64,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::clearTopology()
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+clearTopology()
 {
     if (debug)
     {
@@ -91,10 +93,8 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::clearTopology()
     }
 
     deleteDemandDrivenData(boundaryPointsPtr_);
-
     deleteDemandDrivenData(pointEdgesPtr_);
     deleteDemandDrivenData(pointFacesPtr_);
-
     deleteDemandDrivenData(edgeLoopsPtr_);
 }
 
@@ -106,7 +106,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::clearPatchMeshAddr()
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+clearPatchMeshAddr()
 {
     if (debug)
     {
@@ -129,7 +132,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::clearOut()
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+clearOut()
 {
     clearGeom();
     clearTopology();
@@ -137,8 +143,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::clearOut()
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchEdgeLoops.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchEdgeLoops.C
index ff1c215220..3b7d87df90 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchEdgeLoops.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchEdgeLoops.C
@@ -30,10 +30,7 @@ Description
 
 #include "PrimitivePatch.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-namespace Foam
-{
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
@@ -44,8 +41,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcEdgeLoops()
- const
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcEdgeLoops() const
 {
     if (debug)
     {
@@ -95,7 +94,7 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcEdgeLoops()
     // Current loop number.
     label loopI = 0;
 
-    for (;;)
+    while (true)
     {
         // Find edge not yet given a loop number.
         label currentEdgeI = -1;
@@ -175,8 +174,10 @@ template
     class PointField,
     class PointType
 >
-const labelListList&
-PrimitivePatch<Face, FaceList, PointField, PointType>::edgeLoops() const
+
+const Foam::labelListList&
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+edgeLoops() const
 {
     if (!edgeLoopsPtr_)
     {
@@ -186,8 +187,5 @@ PrimitivePatch<Face, FaceList, PointField, PointType>::edgeLoops() const
     return *edgeLoopsPtr_;
 }
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
 
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchLocalPointOrder.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchLocalPointOrder.C
index cb6987bd21..b4359d83eb 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchLocalPointOrder.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchLocalPointOrder.C
@@ -30,11 +30,6 @@ Description
 #include "SLList.H"
 #include "boolList.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
 template
@@ -44,8 +39,10 @@ template
     class PointField,
     class PointType
 >
-void PrimitivePatch<Face, FaceList, PointField, PointType>::
- calcLocalPointOrder() const
+
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcLocalPointOrder() const
 {
     // Note: Cannot use bandCompressing as point-point addressing does
     // not exist and is not considered generally useful.
@@ -140,9 +137,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::
     }
 }
 
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshData.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshData.C
index e121dfd13c..9941b02459 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshData.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshData.C
@@ -27,10 +27,7 @@ License
 #include "PrimitivePatch.H"
 #include "Map.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-namespace Foam
-{
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -42,7 +39,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcMeshData() const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcMeshData() const
 {
     if (debug)
     {
@@ -128,8 +127,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcMeshPointMap()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcMeshPointMap() const
 {
     if (debug)
     {
@@ -179,8 +179,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcLocalPoints()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcLocalPoints() const
 {
     if (debug)
     {
@@ -231,8 +232,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcPointNormals()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcPointNormals() const
 {
     if (debug)
     {
@@ -298,8 +300,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcFaceNormals()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcFaceNormals() const
 {
     if (debug)
     {
@@ -341,8 +344,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcFaceNormals()
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshEdges.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshEdges.C
index b152ed9d21..79bac6f1c0 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshEdges.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchMeshEdges.C
@@ -28,10 +28,6 @@ Description
 
 #include "PrimitivePatch.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -43,7 +39,9 @@ template
     class PointType
 >
 
-labelList PrimitivePatch<Face, FaceList, PointField, PointType>::meshEdges
+Foam::labelList
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+meshEdges
 (
     const edgeList& allEdges,
     const labelListList& cellEdges,
@@ -119,7 +117,9 @@ template
     class PointType
 >
 
-labelList PrimitivePatch<Face, FaceList, PointField, PointType>::meshEdges
+Foam::labelList
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+meshEdges
 (
     const edgeList& allEdges,
     const labelListList& pointEdges
@@ -133,7 +133,7 @@ labelList PrimitivePatch<Face, FaceList, PointField, PointType>::meshEdges
             << endl;
     }
 
-    // get reference to the list of edges on the patch 
+    // get reference to the list of edges on the patch
     const edgeList& PatchEdges = edges();
 
     // create the storage
@@ -157,7 +157,7 @@ labelList PrimitivePatch<Face, FaceList, PointField, PointType>::meshEdges
             {
                 meshEdges[edgeI] = pe[i];
                 break;
-            } 
+            }
         }
     }
 
@@ -175,7 +175,9 @@ template
     class PointType
 >
 
-label PrimitivePatch<Face, FaceList, PointField, PointType>::whichEdge
+Foam::label
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+whichEdge
 (
     const edge& e
 ) const
@@ -201,8 +203,4 @@ label PrimitivePatch<Face, FaceList, PointField, PointType>::whichEdge
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchPointAddressing.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchPointAddressing.C
index 50703684bb..7ac3612286 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchPointAddressing.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchPointAddressing.C
@@ -30,10 +30,6 @@ Description
 #include "PrimitivePatch.H"
 #include "SLList.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -45,8 +41,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcPointEdges()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcPointEdges() const
 {
     if (debug)
     {
@@ -116,8 +113,9 @@ template
     class PointType
 >
 
-void PrimitivePatch<Face, FaceList, PointField, PointType>::calcPointFaces()
- const
+void
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
+calcPointFaces() const
 {
     if (debug)
     {
@@ -183,8 +181,4 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcPointFaces()
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchProjectPoints.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchProjectPoints.C
index dd1685ffab..d79caa9da4 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchProjectPoints.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchProjectPoints.C
@@ -33,11 +33,6 @@ Description
 #include "objectHit.H"
 #include "bandCompression.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 template
@@ -49,7 +44,8 @@ template
 >
 
 template <class ToPatch>
-List<objectHit> PrimitivePatch<Face, FaceList, PointField, PointType>::
+Foam::List<Foam::objectHit>
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
 projectPoints
 (
     const ToPatch& targetPatch,
@@ -59,7 +55,6 @@ projectPoints
 ) const
 {
     // The current patch is slave, i.e. it is being projected onto the target
-    // 
 
     if (projectionDirection.size() != nPoints())
     {
@@ -101,8 +96,8 @@ projectPoints
     // Loop through all points of the slave side. For every point find the
     // radius for the current contact face. If the contact point falls inside
     // the face and the radius is smaller than for all neighbouring faces,
-    // the contact is found. If not, visit the neighbour closest to the 
-    // calculated contact point. If a single master face is visited more than 
+    // the contact is found. If not, visit the neighbour closest to the
+    // calculated contact point. If a single master face is visited more than
     // twice, initiate n-squared search.
 
     label curFace = 0;
@@ -177,7 +172,7 @@ projectPoints
                     // Calculate the miss point on the plane of the
                     // face.  This is cooked (illogical!) for fastest
                     // surface walk.
-                    // 
+                    //
                     PointType missPlanePoint =
                         curPoint + curProjectionDir*curHit.distance();
 
@@ -216,7 +211,7 @@ projectPoints
             } while (closer);
         }
 
-        if 
+        if
         (
             doNSquaredSearch || !foundEligible
         )
@@ -297,7 +292,8 @@ template
 >
 
 template <class ToPatch>
-List<objectHit> PrimitivePatch<Face, FaceList, PointField, PointType>::
+Foam::List<Foam::objectHit>
+Foam::PrimitivePatch<Face, FaceList, PointField, PointType>::
 projectFaceCentres
 (
     const ToPatch& targetPatch,
@@ -307,7 +303,6 @@ projectFaceCentres
 ) const
 {
     // The current patch is slave, i.e. it is being projected onto the target
-    // 
 
     if (projectionDirection.size() != this->size())
     {
@@ -349,8 +344,8 @@ projectFaceCentres
     // Loop through all points of the slave side. For every point find the
     // radius for the current contact face. If the contact point falls inside
     // the face and the radius is smaller than for all neighbouring faces,
-    // the contact is found. If not, visit the neighbour closest to the 
-    // calculated contact point. If a single master face is visited more than 
+    // the contact is found. If not, visit the neighbour closest to the
+    // calculated contact point. If a single master face is visited more than
     // twice, initiate n-squared search.
 
     label curFace = 0;
@@ -424,11 +419,11 @@ projectFaceCentres
 
                     // Calculate the miss point.  This is
                     // cooked (illogical!) for fastest surface walk.
-                    // 
+                    //
                     PointType missPlanePoint =
                         curFaceCentre + curProjectionDir*curHit.distance();
 
-                    sqrDistance = 
+                    sqrDistance =
                         magSqr(missPlanePoint - masterFaceCentres[curFace]);
 
                     const labelList& masterNbrs = masterFaceFaces[curFace];
@@ -532,8 +527,4 @@ projectFaceCentres
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.C
deleted file mode 100644
index 14d22f06fa..0000000000
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.C
+++ /dev/null
@@ -1,173 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-\*---------------------------------------------------------------------------*/
-
-#include "PrimitivePatchExtra.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
-
-// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
-
-// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
-
-// Construct from components
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-PrimitivePatchExtra
-(
-    const FaceList<Face>& faces,
-    const Field<PointType>& points
-)
-:
-    ParentType(faces, points),
-    sortedEdgeFacesPtr_(NULL),
-    edgeOwnerPtr_(NULL)
-{}
-
-
-// Construct as copy
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-PrimitivePatchExtra
-(
-    const PrimitivePatchExtra<Face, FaceList, PointField, PointType>& pp
-)
-:
-    ParentType(pp),
-    sortedEdgeFacesPtr_(NULL),
-    edgeOwnerPtr_(NULL)
-{}
-
-
-// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-~PrimitivePatchExtra()
-{
-    clearOut();
-}
-
-// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-clearOut()
-{
-    ParentType::clearOut();
-    clearTopology();
-}
-
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-clearTopology()
-{
-    ParentType::clearTopology();
-    deleteDemandDrivenData(sortedEdgeFacesPtr_);
-    deleteDemandDrivenData(edgeOwnerPtr_);
-}
-
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-const Foam::labelListList&
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-sortedEdgeFaces() const
-{
-    if (!sortedEdgeFacesPtr_)
-    {
-        calcSortedEdgeFaces();
-    }
-
-    return *sortedEdgeFacesPtr_;
-}
-
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-const Foam::labelList&
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-edgeOwner() const
-{
-    if (!edgeOwnerPtr_)
-    {
-        calcEdgeOwner();
-    }
-
-    return *edgeOwnerPtr_;
-}
-
-
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-#include "PrimitivePatchExtraAddressing.C"
-#include "PrimitivePatchExtraCleanup.C"
-#include "PrimitivePatchExtraSearch.C"
-
-// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.H b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.H
deleted file mode 100644
index 3818fcbfb5..0000000000
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtra.H
+++ /dev/null
@@ -1,205 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-Class
-    Foam::PrimitivePatchExtra
-
-Description
-    PrimitivePatch with some extra functionality.
-
-SourceFiles
-    PrimitivePatchExtra.C
-
-\*---------------------------------------------------------------------------*/
-
-#ifndef PrimitivePatchExtra_H
-#define PrimitivePatchExtra_H
-
-#include "PrimitivePatch.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
-/*---------------------------------------------------------------------------*\
-                    Class PrimitivePatchExtra Declaration
-\*---------------------------------------------------------------------------*/
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType=point
->
-class PrimitivePatchExtra
-:
-    public PrimitivePatch<Face, FaceList, PointField, PointType>
-{
-
-public:
-
-    // Public typedefs
-
-        typedef Face FaceType;
-        typedef FaceList<Face> FaceListType;
-        typedef PointField PointFieldType;
-
-private:
-
-    // Private typedefs
-    typedef PrimitivePatch<Face, FaceList, PointField, PointType> ParentType;
-
-    // Private data
-
-    // Demand driven private data
-
-        //- Edge-face addressing (sorted)
-        mutable labelListList* sortedEdgeFacesPtr_;
-
-        //- Label of face that 'owns' edge
-        //  i.e. e.vec() is righthanded walk along face
-        mutable labelList* edgeOwnerPtr_;
-
-
-    // Private Member Functions
-
-        //- Calculate sorted edgeFaces
-        void calcSortedEdgeFaces() const;
-
-        //- Calculate owner
-        void calcEdgeOwner() const;
-
-public:
-
-    // Constructors
-
-        //- Construct from components
-        PrimitivePatchExtra
-        (
-            const FaceList<Face>& faces,
-            const Field<PointType>& points
-        );
-
-        //- Construct as copy
-        PrimitivePatchExtra
-        (
-            const PrimitivePatchExtra<Face, FaceList, PointField, PointType>&
-        );
-
-
-    // Destructor
-
-        virtual ~PrimitivePatchExtra();
-
-        void clearOut();
-
-        void clearTopology();
-
-
-    // Member Functions
-
-    // Access functions for demand driven data
-
-    // Topological data; no mesh required.
-
-        //- Return edge-face addressing sorted by angle around the edge.
-        //  Orientation is anticlockwise looking from edge.vec(localPoints())
-        const labelListList& sortedEdgeFaces() const;
-
-        //- If 2 face neighbours: label of face where ordering of edge
-        //  is consistent with righthand walk.
-        //  If 1 neighbour: label of only face.
-        //  If >2 neighbours: undetermined.
-        const labelList& edgeOwner() const;
-
-
-    // Addressing into mesh
-
-
-    // Other patch operations
-
-
-    // Check
-
-        //- Check multiply-connected edges.
-        void checkEdges(const bool verbose) const;
-
-        //- Check orientation (normals) and normals of neighbouring faces
-        boolList checkOrientation(const bool verbose) const;
-
-
-    // Edit
-
-        //- Fill faceZone with currentZone for every face reachable
-        //  from faceI without crossing edge marked in borderEdge.
-        //  Note: faceZone has to be sized nFaces before calling.
-        void markZone
-        (
-            const UList<bool>& borderEdge,
-            const label faceI,
-            const label currentZone,
-            labelList& faceZone
-        ) const;
-
-        //- (size and) fills faceZone with zone of face.
-        //  Zone is area reachable by edge crossing without crossing borderEdge
-        //  (bool for every edge in surface). Returns number of zones.
-        label markZones
-        (
-            const UList<bool>& borderEdge,
-            labelList& faceZone
-        ) const;
-
-        //- Determine the mapping for a sub-mesh.
-        //  Only include faces for which bool List entry is true
-        //  @param[out] pointMap mapping new to old localPoints
-        //  @param[out] faceMap  mapping new to old faces
-        void subsetMap
-        (
-            const UList<bool>& include,
-            labelList& pointMap,
-            labelList& faceMap
-        ) const;
-
-
-};
-
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-#ifdef NoRepository
-#   include "PrimitivePatchExtra.C"
-#endif
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-#endif
-
-// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraAddressing.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraAddressing.C
deleted file mode 100644
index 98782ea40b..0000000000
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraAddressing.C
+++ /dev/null
@@ -1,218 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-Description
-    Contains fix for PrimitivePatch addressing (which doesn't work if surface
-    is non-manifold). Should be moved into PrimitivePatch.
-
-\*---------------------------------------------------------------------------*/
-
-#include "PrimitivePatchExtra.H"
-#include "HashTable.H"
-#include "SortableList.H"
-#include "transform.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-calcSortedEdgeFaces() const
-{
-    if (sortedEdgeFacesPtr_)
-    {
-        FatalErrorIn
-        (
-            "PrimitivePatchExtra<Face, FaceList, PointField>::"
-            "calcSortedEdgeFaces()"
-        )
-            << "sortedEdgeFacesPtr_ already set"
-            << abort(FatalError);
-    }
-
-    const labelListList& eFaces = this->edgeFaces();
-    const edgeList& edgeLst = this->edges();
-    const Field<PointType>& locPointLst = this->localPoints();
-    const List<Face>& locFaceLst  = this->localFaces();
-
-    // create the lists for the various results. (resized on completion)
-    sortedEdgeFacesPtr_ = new labelListList(eFaces.size());
-    labelListList& sortedEdgeFaces = *sortedEdgeFacesPtr_;
-
-    forAll(eFaces, edgeI)
-    {
-        const labelList& myFaceNbs = eFaces[edgeI];
-
-        if (myFaceNbs.size() > 2)
-        {
-            // Get point on edge and normalized direction of edge (= e2 base
-            // of our coordinate system)
-            const edge& e = edgeLst[edgeI];
-
-            const point& edgePt = locPointLst[e.start()];
-
-            vector e2 = e.vec(locPointLst);
-            e2 /= mag(e2) + VSMALL;
-
-            // Get opposite vertex for 0th face
-            const Face& f = locFaceLst[myFaceNbs[0]];
-
-            label fp0 = findIndex(f, e[0]);
-            label fp1 = f.fcIndex(fp0);
-            label vertI = (f[fp1] != e[1] ? f[fp1] : f.fcIndex(fp1));
-
-            // Get vector normal both to e2 and to edge from opposite vertex
-            // to edge (will be x-axis of our coordinate system)
-            vector e0 = e2 ^ (locPointLst[vertI] - edgePt);
-            e0 /= mag(e0) + VSMALL;
-
-            // Get y-axis of coordinate system
-            vector e1 = e2 ^ e0;
-
-            SortableList<scalar> faceAngles(myFaceNbs.size());
-
-            // e0 is reference so angle is 0
-            faceAngles[0] = 0;
-
-            for (label nbI = 1; nbI < myFaceNbs.size(); nbI++)
-            {
-                // Get opposite vertex
-                const Face& f = locFaceLst[myFaceNbs[nbI]];
-                label fp0 = findIndex(f, e[0]);
-                label fp1 = f.fcIndex(fp0);
-                label vertI = (f[fp1] != e[1] ? f[fp1] : f.fcIndex(fp1));
-
-                vector vec = e2 ^ (locPointLst[vertI] - edgePt);
-                vec /= mag(vec) + VSMALL;
-
-                faceAngles[nbI] = pseudoAngle
-                (
-                    e0,
-                    e1,
-                    vec
-                );
-            }
-
-            faceAngles.sort();
-
-            sortedEdgeFaces[edgeI] = IndirectList<label>
-            (
-                myFaceNbs,
-                faceAngles.indices()
-            );
-        }
-        else
-        {
-            // No need to sort. Just copy.
-            sortedEdgeFaces[edgeI] = myFaceNbs;
-        }
-    }
-}
-
-
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-calcEdgeOwner() const
-{
-    if (edgeOwnerPtr_)
-    {
-        FatalErrorIn
-        (
-            "PrimitivePatchExtra<Face, FaceList, PointField>::"
-            "calcEdgeOwner()"
-        )
-            << "edgeOwnerPtr_ already set"
-            << abort(FatalError);
-    }
-
-    // create the owner list
-    edgeOwnerPtr_ = new labelList(this->nEdges());
-    labelList& edgeOwner = *edgeOwnerPtr_;
-
-    const edgeList& edgeLst = this->edges();
-    const labelListList& eFaces = this->edgeFaces();
-    const List<Face>& locFaceLst = this->localFaces();
-
-
-    forAll(edgeLst, edgeI)
-    {
-        const edge& e = edgeLst[edgeI];
-        const labelList& neighbouringFaces = eFaces[edgeI];
-
-        if (neighbouringFaces.size() == 1)
-        {
-            edgeOwner[edgeI] = neighbouringFaces[0];
-        }
-        else
-        {
-            // Find the first face whose vertices are aligned with the edge.
-            // with multiply connected edges, this is the best we can do
-            edgeOwner[edgeI] = -1;
-
-            forAll(neighbouringFaces, i)
-            {
-                const Face& f = locFaceLst[neighbouringFaces[i]];
-
-                if (f.edgeDirection(e) > 0)
-                {
-                    edgeOwner[edgeI] = neighbouringFaces[i];
-                    break;
-                }
-            }
-
-            if (edgeOwner[edgeI] == -1)
-            {
-                FatalErrorIn
-                (
-                    "PrimitivePatchExtra<Face, FaceList, PointField>::"
-                    "calcEdgeOwner()"
-                )
-                    << "Edge " << edgeI << " vertices:" << e
-                    << " is used by faces " << neighbouringFaces
-                    << " vertices:"
-                    << IndirectList<Face>(locFaceLst, neighbouringFaces)()
-                    << " none of which use the edge vertices in the same order"
-                    << nl << "I give up" << abort(FatalError);
-            }
-        }
-    }
-}
-
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraCleanup.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraCleanup.C
deleted file mode 100644
index c825f44a0e..0000000000
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraCleanup.C
+++ /dev/null
@@ -1,239 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software; you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by the
-    Free Software Foundation; either version 2 of the License, or (at your
-    option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM; if not, write to the Free Software Foundation,
-    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-\*---------------------------------------------------------------------------*/
-
-#include "PrimitivePatchExtra.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
-
-// Check/fix edges with more than two faces
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-checkEdges
-(
-    const bool verbose
-) const
-{
-    const labelListList& eFaces = this->edgeFaces();
-    const edgeList& edgeLst = this->edges();
-
-    forAll(eFaces, edgeI)
-    {
-        const labelList& myFaces = eFaces[edgeI];
-
-        // boundary edges have one face
-        // interior edges have two faces
-        if (myFaces.empty())
-        {
-            FatalErrorIn
-            (
-                "PrimitivePatchExtra::checkEdges(bool verbose)"
-            )
-                << "Edge " << edgeI << " with vertices " << edgeLst[edgeI]
-                << " has no edgeFaces"
-                << exit(FatalError);
-        }
-        else if (myFaces.size() > 2)
-        {
-            WarningIn
-            (
-                "PrimitivePatchExtra::checkEdges(bool verbose)"
-            )
-                << "Edge " << edgeI << " with vertices " << edgeLst[edgeI]
-                << " has more than 2 faces connected to it : " << myFaces
-                << endl;
-        }
-    }
-}
-
-
-// Check normals and orientation
-template
-<
-    class Face,
-    template<class> class FaceList,
-    class PointField,
-    class PointType
->
-Foam::boolList
-Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-checkOrientation
-(
-    const bool verbose
-) const
-{
-    const FaceList<Face>& faceLst = *this;
-    const edgeList& edgeLst = this->edges();
-    const labelListList& faceEs = this->faceEdges();
-    const label numEdges = this->nEdges();
-    const Field<PointType>& pointLst = this->points();
-    const vectorField& normLst = this->faceNormals();
-
-    if (ParentType::debug)
-    {
-        Info<<"checkOrientation:::checkOrientation(bool)" << endl;
-    }
-
-    // Check edge normals, face normals, point normals.
-    forAll(faceEs, faceI)
-    {
-        const labelList& edgeLabels = faceEs[faceI];
-
-        if (edgeLabels.size() < 3)
-        {
-            FatalErrorIn
-            (
-                "PrimitivePatchExtra::checkOrientation(bool)"
-            )
-                << "face " << faceLst[faceI]
-                << " has fewer than 3 edges. Edges:" << edgeLabels
-                << exit(FatalError);
-        }
-
-        bool valid = true;
-        forAll(edgeLabels, i)
-        {
-            if (edgeLabels[i] < 0 || edgeLabels[i] >= numEdges)
-            {
-                WarningIn
-                (
-                    "PrimitivePatchExtra::checkOrientation(bool)"
-                )
-                    << "edge number " << edgeLabels[i] << " on face " << faceI
-                    << " out-of-range\n"
-                    << "This usually means the input surface has "
-                    << "edges with more than 2 faces connected.\n"
-                    << endl;
-                valid = false;
-            }
-        }
-        if (!valid)
-        {
-            continue;
-        }
-
-
-        //
-        //- Compute normal from 3 points, use the first as the origin
-        // minor warpage should not be a problem
-        const Face& f = faceLst[faceI];
-        const point p0(pointLst[f[0]]);
-        const point p1(pointLst[f[1]]);
-        const point p2(pointLst[f[f.size()-1]]);
-
-        const vector pointNormal((p1 - p0) ^ (p2 - p0));
-        if ((pointNormal & normLst[faceI]) < 0)
-        {
-            FatalErrorIn
-            (
-                "PrimitivePatchExtra::checkOrientation(bool)"
-            )
-                << "Normal calculated from points inconsistent with faceNormal"
-                << nl
-                << "face: " << f << nl
-                << "points: " << p0 << ' ' << p1 << ' ' << p2 << nl
-                << "pointNormal:" << pointNormal << nl
-                << "faceNormal:" << normLst[faceI]
-                << exit(FatalError);
-        }
-    }
-
-
-    const labelListList& eFaces    = this->edgeFaces();
-    const pointField& locPointsLst = this->localPoints();
-
-    // Storage for holding status of edge.
-    // True if normal flips across this edge
-    boolList borderEdge(numEdges, false);
-
-    forAll(edgeLst, edgeI)
-    {
-        const edge& e = edgeLst[edgeI];
-        const labelList& neighbouringFaces = eFaces[edgeI];
-
-        if (neighbouringFaces.size() == 2)
-        {
-            // we use localFaces() since edges() are LOCAL
-            // these are both already available
-            const Face& faceA = this->localFaces()[neighbouringFaces[0]];
-            const Face& faceB = this->localFaces()[neighbouringFaces[1]];
-
-            // If the faces are correctly oriented, the edges must go in
-            // different directions on connected faces.
-            if (faceA.edgeDirection(e) == faceB.edgeDirection(e))
-            {
-                borderEdge[edgeI] = true;
-                if (verbose)
-                {
-                    WarningIn
-                    (
-                        "PrimitivePatchExtra::checkOrientation(bool)"
-                    )
-                        << "face orientation incorrect." << nl
-                        << "localEdge[" << edgeI << "] " << e
-                        << " between faces:" << nl
-                        << "  face[" << neighbouringFaces[0] << "] "
-                        << faceLst[neighbouringFaces[0]]
-                        << "   localFace: " << faceA
-                        << nl
-                        << "  face[" << neighbouringFaces[1] << "] "
-                        << faceLst[neighbouringFaces[1]]
-                        << "   localFace: " << faceB
-                        << endl;
-                }
-            }
-        }
-        else if (neighbouringFaces.size() != 1)
-        {
-            if (verbose)
-            {
-                WarningIn
-                (
-                    "PrimitivePatchExtra::checkOrientation(bool)"
-                )
-                    << "Wrong number of edge neighbours." << nl
-                    << "edge[" << edgeI << "] " << e
-                    << " with points:" << locPointsLst[e.start()]
-                    << ' ' << locPointsLst[e.end()]
-                    << " has neighbouringFaces:" << neighbouringFaces << endl;
-            }
-            borderEdge[edgeI] = true;
-        }
-    }
-
-    return borderEdge;
-}
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.C
new file mode 100644
index 0000000000..bd41c42c5b
--- /dev/null
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.C
@@ -0,0 +1,37 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+\*---------------------------------------------------------------------------*/
+
+#include "PrimitivePatchTools.H"
+
+#include "PrimitivePatchToolsCheck.C"
+#include "PrimitivePatchToolsEdgeOwner.C"
+#include "PrimitivePatchToolsSearch.C"
+#include "PrimitivePatchToolsSortEdges.C"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.H b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.H
new file mode 100644
index 0000000000..c4631b1be5
--- /dev/null
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchTools.H
@@ -0,0 +1,181 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+Class
+    Foam::PrimitivePatchTools
+
+Description
+    A collect of tools for searching, sort PrimitivePatch information.
+
+SourceFiles
+    PrimitivePatchTools.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef PrimitivePatchTools_H
+#define PrimitivePatchTools_H
+
+#include "PrimitivePatch.H"
+#include "HashSet.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                    Class PatchTools Declaration
+\*---------------------------------------------------------------------------*/
+
+class PatchTools
+{
+public:
+
+    //- Check for orientation issues.
+    //  Returns true if problems were found.
+    //  If a normal flips across an edge, places it in the HashSet
+    template
+    <
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static bool checkOrientation
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
+        const bool report = false,
+        labelHashSet* marked = 0
+    );
+
+
+    //- Fill faceZone with currentZone for every face reachable
+    //  from faceI without crossing edge marked in borderEdge.
+    //  Note: faceZone has to be sized nFaces before calling.
+    template
+    <
+        class BoolListType,
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static void markZone
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
+        const BoolListType& borderEdge,
+        const label faceI,
+        const label currentZone,
+        labelList& faceZone
+    );
+
+    //- Size and fills faceZone with zone of face.
+    //  Zone is area reachable by edge crossing without crossing borderEdge.
+    //  Returns number of zones.
+    template
+    <
+        class BoolListType,
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static label markZones
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
+        const BoolListType& borderEdge,
+        labelList& faceZone
+    );
+
+    //- Determine the mapping for a sub-patch.
+    //  Only include faces for which bool-list entry is true.
+    //  @param[in]  includeFaces faces to include
+    //  @param[out] pointMap mapping new to old localPoints
+    //  @param[out] faceMap  mapping new to old faces
+    template
+    <
+        class BoolListType,
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static void subsetMap
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
+        const BoolListType& includeFaces,
+        labelList& pointMap,
+        labelList& faceMap
+    );
+
+    //- Return edge-face addressing sorted by angle around the edge.
+    //  Orientation is anticlockwise looking from edge.vec(localPoints())
+    template
+    <
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static labelListList sortedEdgeFaces
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&
+    );
+
+
+    //- If 2 face neighbours: label of face where ordering of edge
+    //  is consistent with righthand walk.
+    //  If 1 neighbour: label of only face.
+    //  If >2 neighbours: undetermined.
+    template
+    <
+        class Face,
+        template<class> class FaceList,
+        class PointField,
+        class PointType
+    >
+    static labelList edgeOwner
+    (
+        const PrimitivePatch<Face, FaceList, PointField, PointType>&
+    );
+
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+#   include "PrimitivePatchTools.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsCheck.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsCheck.C
new file mode 100644
index 0000000000..e779d61b18
--- /dev/null
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsCheck.C
@@ -0,0 +1,180 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+\*---------------------------------------------------------------------------*/
+
+#include "PrimitivePatchTools.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template
+<
+    class Face,
+    template<class> class FaceList,
+    class PointField,
+    class PointType
+>
+
+bool
+Foam::PatchTools::checkOrientation
+(
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p,
+    const bool report,
+    labelHashSet* setPtr
+)
+{
+    bool foundError = false;
+
+    // Check edge normals, face normals, point normals.
+    forAll(p.faceEdges(), faceI)
+    {
+        const labelList& edgeLabels = p.faceEdges()[faceI];
+        bool valid = true;
+
+        if (edgeLabels.size() < 3)
+        {
+            if (report)
+            {
+                Info<< "Face[" << faceI << "] " << p[faceI]
+                    << " has fewer than 3 edges. Edges: " << edgeLabels
+                    << nl;
+            }
+            valid = false;
+        }
+        else
+        {
+            forAll(edgeLabels, i)
+            {
+                if (edgeLabels[i] < 0 || edgeLabels[i] >= p.nEdges())
+                {
+                    if (report)
+                    {
+                        Info<< "edge number " << edgeLabels[i] << " on face " << faceI
+                            << " out-of-range\n"
+                            << "This usually means the input surface has "
+                            << "edges with more than 2 faces connected." << nl;
+                    }
+                    valid = false;
+                }
+            }
+        }
+
+        if (!valid)
+        {
+            foundError = true;
+            continue;
+        }
+
+
+        //
+        //- Compute normal from 3 points, use the first as the origin
+        // minor warpage should not be a problem
+        const Face& f = p[faceI];
+        const point p0(p.points()[f[0]]);
+        const point p1(p.points()[f[1]]);
+        const point p2(p.points()[f[f.size()-1]]);
+
+        const vector pointNormal((p1 - p0) ^ (p2 - p0));
+        if ((pointNormal & p.faceNormals()[faceI]) < 0)
+        {
+            foundError = false;
+
+            if (report)
+            {
+                Info
+                    << "Normal calculated from points inconsistent with faceNormal"
+                    << nl
+                    << "face: " << f << nl
+                    << "points: " << p0 << ' ' << p1 << ' ' << p2 << nl
+                    << "pointNormal:" << pointNormal << nl
+                    << "faceNormal:" << p.faceNormals()[faceI] << nl;
+            }
+        }
+    }
+
+
+    forAll(p.edges(), edgeI)
+    {
+        const edge& e = p.edges()[edgeI];
+        const labelList& neighbouringFaces = p.edgeFaces()[edgeI];
+
+        if (neighbouringFaces.size() == 2)
+        {
+            // we use localFaces() since edges() are LOCAL
+            // these are both already available
+            const Face& faceA = p.localFaces()[neighbouringFaces[0]];
+            const Face& faceB = p.localFaces()[neighbouringFaces[1]];
+
+            // If the faces are correctly oriented, the edges must go in
+            // different directions on connected faces.
+            if (faceA.edgeDirection(e) == faceB.edgeDirection(e))
+            {
+                if (report)
+                {
+                    Info<< "face orientation incorrect." << nl
+                        << "localEdge[" << edgeI << "] " << e
+                        << " between faces:" << nl
+                        << "  face[" << neighbouringFaces[0] << "] "
+                        << p[neighbouringFaces[0]]
+                        << "   localFace: " << faceA
+                        << nl
+                        << "  face[" << neighbouringFaces[1] << "] "
+                        << p[neighbouringFaces[1]]
+                        << "   localFace: " << faceB
+                        << endl;
+                }
+                if (setPtr)
+                {
+                    setPtr->insert(edgeI);
+                }
+
+                foundError = true;
+            }
+        }
+        else if (neighbouringFaces.size() != 1)
+        {
+            if (report)
+            {
+                Info
+                    << "Wrong number of edge neighbours." << nl
+                    << "edge[" << edgeI << "] " << e
+                    << " with points:" << p.localPoints()[e.start()]
+                    << ' ' << p.localPoints()[e.end()]
+                    << " has neighbouringFaces:" << neighbouringFaces << endl;
+            }
+
+            if (setPtr)
+            {
+                setPtr->insert(edgeI);
+            }
+
+            foundError = true;
+        }
+    }
+
+    return foundError;
+}
+
+
+// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsEdgeOwner.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsEdgeOwner.C
new file mode 100644
index 0000000000..ecf85633e2
--- /dev/null
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsEdgeOwner.C
@@ -0,0 +1,95 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+\*---------------------------------------------------------------------------*/
+
+#include "PrimitivePatchTools.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template
+<
+    class Face,
+    template<class> class FaceList,
+    class PointField,
+    class PointType
+>
+
+Foam::labelList
+Foam::PatchTools::edgeOwner
+(
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p
+)
+{
+    const edgeList& edges = p.edges();
+    const labelListList& edgeFaces = p.edgeFaces();
+    const List<Face>& localFaces = p.localFaces();
+
+    // create the owner list
+    labelList edgeOwner(edges.size(), -1);
+
+    forAll(edges, edgeI)
+    {
+        const labelList& nbrFaces = edgeFaces[edgeI];
+
+        if (nbrFaces.size() == 1)
+        {
+            edgeOwner[edgeI] = nbrFaces[0];
+        }
+        else
+        {
+            // Find the first face whose vertices are aligned with the edge.
+            // with multiply connected edges, this is the best we can do
+            forAll(nbrFaces, i)
+            {
+                const Face& f = localFaces[nbrFaces[i]];
+
+                if (f.edgeDirection(edges[edgeI]) > 0)
+                {
+                    edgeOwner[edgeI] = nbrFaces[i];
+                    break;
+                }
+            }
+
+            if (edgeOwner[edgeI] == -1)
+            {
+                FatalErrorIn
+                (
+                    "PatchTools::edgeOwner()"
+                )
+                    << "Edge " << edgeI << " vertices:" << edges[edgeI]
+                    << " is used by faces " << nbrFaces
+                    << " vertices:"
+                    << IndirectList<Face>(localFaces, nbrFaces)()
+                    << " none of which use the edge vertices in the same order"
+                    << nl << "I give up" << abort(FatalError);
+            }
+        }
+    }
+
+    return edgeOwner;
+}
+
+
+// ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraSearch.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSearch.C
similarity index 66%
rename from src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraSearch.C
rename to src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSearch.C
index 0d56d9be1e..639d375972 100644
--- a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraSearch.C
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSearch.C
@@ -22,35 +22,42 @@ License
     along with OpenFOAM; if not, write to the Free Software Foundation,
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
+Description
+    Searching and marking zones of the patch.
+
 \*---------------------------------------------------------------------------*/
 
-#include "PrimitivePatchExtra.H"
+#include "PrimitivePatchTools.H"
 
-// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-// Finds area, starting at faceI, delimited by borderEdge. Marks all visited
-// faces (from face-edge-face walk) with currentZone.
+// Finds area, starting at faceI, delimited by borderEdge.
+// Marks all visited faces (from face-edge-face walk) with currentZone.
 template
 <
+    class BoolListType,
     class Face,
     template<class> class FaceList,
     class PointField,
     class PointType
 >
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
+
+void
+Foam::PatchTools::markZone
 (
-    const UList<bool>& borderEdge,
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p,
+    const BoolListType& borderEdge,
     const label faceI,
     const label currentZone,
-    labelList& faceZone
-) const
+    labelList&  faceZone
+)
 {
+    const labelListList& faceEdges = p.faceEdges();
+    const labelListList& edgeFaces = p.edgeFaces();
+
     // List of faces whose faceZone has been set.
     labelList changedFaces(1, faceI);
 
-    const labelListList& faceEs = this->faceEdges();
-    const labelListList& eFaces = this->edgeFaces();
-
     while (true)
     {
         // Pick up neighbours of changedFaces
@@ -60,7 +67,7 @@ void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
         {
             label faceI = changedFaces[i];
 
-            const labelList& fEdges = faceEs[faceI];
+            const labelList& fEdges = faceEdges[faceI];
 
             forAll(fEdges, fEdgeI)
             {
@@ -68,7 +75,7 @@ void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
 
                 if (!borderEdge[edgeI])
                 {
-                    const labelList& eFaceLst = eFaces[edgeI];
+                    const labelList& eFaceLst = edgeFaces[edgeI];
 
                     forAll(eFaceLst, j)
                     {
@@ -83,8 +90,8 @@ void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
                         {
                             FatalErrorIn
                             (
-                                "PrimitivePatchExtra<Face, FaceList, PointField>::markZone"
-                                "(const boolList&, const label, const label, labelList&) const"
+                                "PatchTools::markZone"
+                                "(const boolList&, const label, const label, labelList&)"
                             )
                                 << "Zones " << faceZone[nbrFaceI]
                                 << " at face " << nbrFaceI
@@ -112,60 +119,38 @@ void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
 // Fills faceZone accordingly
 template
 <
+    class BoolListType,
     class Face,
     template<class> class FaceList,
     class PointField,
     class PointType
 >
-Foam::label Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-markZones
+
+Foam::label
+Foam::PatchTools::markZones
 (
-    const UList<bool>& borderEdge,
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p,
+    const BoolListType& borderEdge,
     labelList& faceZone
-) const
+)
 {
-    const label numEdges = this->nEdges();
-    const label numFaces = this->size();
-
-    if (borderEdge.size() != numEdges)
-    {
-        FatalErrorIn
-        (
-            "PrimitivePatchExtra<Face, FaceList, PointField>::markZones"
-            "(const boolList&, labelList&)"
-        )
-            << "borderEdge boolList not same size as number of edges" << endl
-            << "borderEdge:" << borderEdge.size() << endl
-            << "nEdges    :" << numEdges
-            << exit(FatalError);
-    }
-
-    faceZone.setSize(numFaces);
+    faceZone.setSize(p.size());
     faceZone = -1;
 
     label zoneI = 0;
-    label startFaceI = 0;
-
-    while (true)
+    for (label startFaceI = 0; startFaceI < faceZone.size();)
     {
-        // Find first non-visited face
-        for (; startFaceI < numFaces; startFaceI++)
+        // Find next non-visited face
+        for (; startFaceI < faceZone.size(); ++startFaceI)
         {
             if (faceZone[startFaceI] == -1)
             {
                 faceZone[startFaceI] = zoneI;
-                markZone(borderEdge, startFaceI, zoneI, faceZone);
+                markZone(p, borderEdge, startFaceI, zoneI, faceZone);
+                zoneI++;
                 break;
             }
         }
-
-        if (startFaceI >= numFaces)
-        {
-            // Finished
-            break;
-        }
-
-        zoneI++;
     }
 
     return zoneI;
@@ -177,46 +162,48 @@ markZones
 // Fills faceZone accordingly
 template
 <
+    class BoolListType,
     class Face,
     template<class> class FaceList,
     class PointField,
     class PointType
 >
-void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::
-subsetMap
+
+void
+Foam::PatchTools::subsetMap
 (
-    const UList<bool>& include,
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p,
+    const BoolListType& includeFaces,
     labelList& pointMap,
     labelList& faceMap
-) const
+)
 {
-    const List<Face>& locFaces = this->localFaces();
-    const label numPoints = this->nPoints();
-
-    label faceI = 0;
+    label faceI  = 0;
     label pointI = 0;
 
-    faceMap.setSize(locFaces.size());
-    pointMap.setSize(numPoints);
+    const List<Face>& localFaces = p.localFaces();
 
-    boolList pointHad(numPoints, false);
+    faceMap.setSize(localFaces.size());
+    pointMap.setSize(p.nPoints());
 
-    forAll(include, oldFaceI)
+    boolList pointHad(pointMap.size(), false);
+
+    forAll(p, oldFaceI)
     {
-        if (include[oldFaceI])
+        if (includeFaces[oldFaceI])
         {
             // Store new faces compact
             faceMap[faceI++] = oldFaceI;
 
             // Renumber labels for face
-            const Face& f = locFaces[oldFaceI];
+            const Face& f = localFaces[oldFaceI];
 
             forAll(f, fp)
             {
                 const label ptLabel = f[fp];
                 if (!pointHad[ptLabel])
                 {
-                    pointHad[ptLabel] = true;
+                    pointHad[ptLabel]  = true;
                     pointMap[pointI++] = ptLabel;
                 }
             }
@@ -229,6 +216,4 @@ subsetMap
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSortEdges.C b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSortEdges.C
new file mode 100644
index 0000000000..0aaa3b2e48
--- /dev/null
+++ b/src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchTools/PrimitivePatchToolsSortEdges.C
@@ -0,0 +1,128 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+\*---------------------------------------------------------------------------*/
+
+#include "PrimitivePatchTools.H"
+#include "SortableList.H"
+#include "transform.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template
+<
+    class Face,
+    template<class> class FaceList,
+    class PointField,
+    class PointType
+>
+
+Foam::labelListList
+Foam::PatchTools::sortedEdgeFaces
+(
+    const PrimitivePatch<Face, FaceList, PointField, PointType>& p
+)
+{
+    const edgeList& edges = p.edges();
+    const labelListList& edgeFaces = p.edgeFaces();
+    const List<Face>& localFaces = p.localFaces();
+    const Field<PointType>& localPoints = p.localPoints();
+
+    // create the lists for the various results. (resized on completion)
+    labelListList& sortedEdgeFaces = labelListList(edgeFaces.size());
+
+    forAll(edgeFaces, edgeI)
+    {
+        const labelList& faceNbs = edgeFaces[edgeI];
+
+        if (faceNbs.size() > 2)
+        {
+            // Get point on edge and normalized direction of edge (= e2 base
+            // of our coordinate system)
+            const edge& e = edges[edgeI];
+
+            const point& edgePt = localPoints[e.start()];
+
+            vector e2 = e.vec(localPoints);
+            e2 /= mag(e2) + VSMALL;
+
+            // Get opposite vertex for 0th face
+            const Face& f = localFaces[faceNbs[0]];
+
+            label fp0 = findIndex(f, e[0]);
+            label fp1 = f.fcIndex(fp0);
+            label vertI = (f[fp1] != e[1] ? f[fp1] : f.fcIndex(fp1));
+
+            // Get vector normal both to e2 and to edge from opposite vertex
+            // to edge (will be x-axis of our coordinate system)
+            vector e0 = e2 ^ (localPoints[vertI] - edgePt);
+            e0 /= mag(e0) + VSMALL;
+
+            // Get y-axis of coordinate system
+            vector e1 = e2 ^ e0;
+
+            SortableList<scalar> faceAngles(faceNbs.size());
+
+            // e0 is reference so angle is 0
+            faceAngles[0] = 0;
+
+            for (label nbI = 1; nbI < faceNbs.size(); nbI++)
+            {
+                // Get opposite vertex
+                const Face& f = localFaces[faceNbs[nbI]];
+                label fp0 = findIndex(f, e[0]);
+                label fp1 = f.fcIndex(fp0);
+                label vertI = (f[fp1] != e[1] ? f[fp1] : f.fcIndex(fp1));
+
+                vector vec = e2 ^ (localPoints[vertI] - edgePt);
+                vec /= mag(vec) + VSMALL;
+
+                faceAngles[nbI] = pseudoAngle
+                (
+                    e0,
+                    e1,
+                    vec
+                );
+            }
+
+            faceAngles.sort();
+
+            sortedEdgeFaces[edgeI] = IndirectList<label>
+            (
+                faceNbs,
+                faceAngles.indices()
+            );
+        }
+        else
+        {
+            // No need to sort. Just copy.
+            sortedEdgeFaces[edgeI] = faceNbs;
+        }
+    }
+
+    return sortedEdgeFaces;
+}
+
+
+// ************************************************************************* //
diff --git a/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.C b/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.C
index 6135f70378..c495cb4afd 100644
--- a/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.C
+++ b/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.C
@@ -27,6 +27,7 @@ License
 #include "BasicMeshedSurface.H"
 #include "boundBox.H"
 #include "mergePoints.H"
+
 // * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
 template<class Face>
@@ -162,7 +163,7 @@ void Foam::BasicMeshedSurface<Face>::cleanup(const bool verbose)
     stitchFaces(SMALL, verbose);
 
     checkFaces(verbose);
-    this->checkEdges(verbose);
+    this->checkTopology(verbose);
 }
 
 
diff --git a/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.H b/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.H
index bb31595d0a..e43cfa48fa 100644
--- a/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.H
+++ b/src/surfMesh/BasicMeshedSurface/BasicMeshedSurface.H
@@ -36,7 +36,8 @@ SourceFiles
 #ifndef BasicMeshedSurface_H
 #define BasicMeshedSurface_H
 
-#include "PrimitivePatchExtra.H"
+#include "PrimitivePatch.H"
+#include "PrimitivePatchTools.H"
 #include "pointField.H"
 #include "face.H"
 #include "triFace.H"
@@ -55,11 +56,11 @@ namespace Foam
 template<class Face>
 class BasicMeshedSurface
 :
-    public PrimitivePatchExtra<Face, ::Foam::List, pointField, point>
+    public PrimitivePatch<Face, ::Foam::List, pointField, point>
 {
 
     //- Typedefs for convenience
-        typedef PrimitivePatchExtra
+        typedef PrimitivePatch
         <
             Face,
             ::Foam::List,
@@ -83,7 +84,7 @@ protected:
             return static_cast<List<Face> &>(*this);
         }
 
-        //- Set new regions/patches from faceMap
+        //- Set new regions from faceMap
         virtual void remapFaces(const UList<label>& faceMap);
 
 public:
diff --git a/src/surfMesh/Make/files b/src/surfMesh/Make/files
index 19c5eee8b5..21733262f0 100644
--- a/src/surfMesh/Make/files
+++ b/src/surfMesh/Make/files
@@ -1,6 +1,6 @@
-surfGroup/surfGroup.C
-surfGroup/surfGroupIOList.C
-surfPatchIdentifier/surfPatchIdentifier.C
+surfRegion/surfRegion/surfRegion.C
+surfRegion/surfRegion/surfRegionIOList.C
+surfRegion/surfRegionIdentifier/surfRegionIdentifier.C
 
 MeshedSurface/MeshedSurfaces.C
 UnsortedMeshedSurface/UnsortedMeshedSurfaces.C
diff --git a/src/surfMesh/MeshedSurface/MeshedSurface.C b/src/surfMesh/MeshedSurface/MeshedSurface.C
index 7c0dc9cdcd..8e9d86d207 100644
--- a/src/surfMesh/MeshedSurface/MeshedSurface.C
+++ b/src/surfMesh/MeshedSurface/MeshedSurface.C
@@ -26,6 +26,7 @@ License
 
 #include "MeshedSurface.H"
 #include "UnsortedMeshedSurface.H"
+#include "PrimitivePatchTools.H"
 #include "IFstream.H"
 #include "OFstream.H"
 #include "Time.H"
@@ -166,11 +167,11 @@ Foam::MeshedSurface<Face>::MeshedSurface
 (
     const Xfer<pointField>& pointLst,
     const Xfer<List<Face> >& faceLst,
-    const Xfer<surfGroupList>& patchLst
+    const Xfer<surfRegionList>& regionLst
 )
 :
     ParentType(pointLst, faceLst),
-    patches_(patchLst)
+    regions_(regionLst)
 {}
 
 
@@ -179,26 +180,26 @@ Foam::MeshedSurface<Face>::MeshedSurface
 (
     const Xfer<pointField>& pointLst,
     const Xfer<List<Face> >& faceLst,
-    const UList<label>& patchSizes,
-    const UList<word>& patchNames
+    const UList<label>& regionSizes,
+    const UList<word>& regionNames
 )
 :
     ParentType(pointLst, faceLst)
 {
-    if (&patchSizes)
+    if (&regionSizes)
     {
-        if (&patchNames)
+        if (&regionNames)
         {
-            addPatches(patchSizes, patchNames);
+            addRegions(regionSizes, regionNames);
         }
         else
         {
-            addPatches(patchSizes);
+            addRegions(regionSizes);
         }
     }
     else
     {
-        onePatch();
+        oneRegion();
     }
 }
 
@@ -238,15 +239,15 @@ Foam::MeshedSurface<Face>::MeshedSurface
     );
 
 
-    // create patch list
-    surfGroupList newPatches(bPatches.size());
+    // create region list
+    surfRegionList newRegions(bPatches.size());
 
     label startFaceI = 0;
     forAll(bPatches, patchI)
     {
         const polyPatch& p = bPatches[patchI];
 
-        newPatches[patchI] = surfGroup
+        newRegions[patchI] = surfRegion
         (
             p.name(),
             p.size(),
@@ -262,7 +263,7 @@ Foam::MeshedSurface<Face>::MeshedSurface
     (
         xferCopy(bPoints),
         xferCopy(bFaces),
-        xferMove(newPatches)
+        xferMove(newRegions)
     );
 
 
@@ -285,7 +286,7 @@ Foam::MeshedSurface<Face>::MeshedSurface
         origFaces.clear();
 
         this->storedFaces().transfer(newFaces);
-        patches_.transfer(surf.patches_);
+        regions_.transfer(surf.regions_);
     }
     else
     {
@@ -305,15 +306,15 @@ Foam::MeshedSurface<Face>::MeshedSurface
 {
     const surfPatchList& sPatches = sMesh.boundaryMesh();
 
-    // create patch list
-    List<surfGroup> newPatches(sPatches.size());
+    // create regions list
+    List<surfRegion> newRegions(sPatches.size());
 
     label startFaceI = 0;
     forAll(sPatches, patchI)
     {
         const surfPatch& p = sPatches[patchI];
 
-        newPatches[patchI] = surfGroup
+        newRegions[patchI] = surfRegion
         (
             p.name(),
             p.size(),
@@ -324,7 +325,7 @@ Foam::MeshedSurface<Face>::MeshedSurface
         startFaceI += p.size();
     }
 
-    patches_.transfer(newPatches);
+    regions_.transfer(newRegions);
 }
 #endif
 
@@ -336,8 +337,8 @@ Foam::MeshedSurface<Face>::MeshedSurface
 )
 {
     labelList faceMap;
-    surfGroupList patchLst = surf.sortedRegions(faceMap);
-    patches_.transfer(patchLst);
+    surfRegionList regionLst = surf.sortedRegions(faceMap);
+    regions_.transfer(regionLst);
 
     const List<Face>& origFaces = surf.faces();
     List<Face> newFaces(origFaces.size());
@@ -388,7 +389,7 @@ template<class Face>
 Foam::MeshedSurface<Face>::MeshedSurface(const MeshedSurface& surf)
 :
     ParentType(surf),
-    patches_(surf.patches_)
+    regions_(surf.regions_)
 {}
 
 
@@ -420,70 +421,70 @@ Foam::MeshedSurface<Face>::~MeshedSurface()
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
 template<class Face>
-void Foam::MeshedSurface<Face>::onePatch(const word& name)
+void Foam::MeshedSurface<Face>::oneRegion(const word& name)
 {
-    word patchName(name);
-    if (patchName.empty())
+    word regionName(name);
+    if (regionName.empty())
     {
-        if (patches_.size())
+        if (regions_.size())
         {
-            patchName = patches_[0].name();
+            regionName = regions_[0].name();
         }
-        if (patchName.empty())
+        if (regionName.empty())
         {
-            patchName = "patch0";
+            regionName = "region0";
         }
     }
 
-    // set single default patch
-    patches_.setSize(1);
-    patches_[0] = surfGroup
+    // set single default region
+    regions_.setSize(1);
+    regions_[0] = surfRegion
     (
-        patchName,
-        size(),         // patch size
-        0,              // patch start
-        0               // patch index
+        regionName,
+        size(),         // region size
+        0,              // region start
+        0               // region index
     );
 }
 
 
 template<class Face>
-void Foam::MeshedSurface<Face>::checkPatches()
+void Foam::MeshedSurface<Face>::checkRegions()
 {
-    // extra safety, ensure we have at some patches,
+    // extra safety, ensure we have at some regions
     // and they cover all the faces - fix start silently
-    if (patches_.size() <= 1)
+    if (regions_.size() <= 1)
     {
-        onePatch();
+        oneRegion();
     }
     else
     {
         label count = 0;
-        forAll(patches_, patchI)
+        forAll(regions_, regionI)
         {
-            patches_[patchI].start() = count;
-            count += patches_[patchI].size();
+            regions_[regionI].start() = count;
+            count += regions_[regionI].size();
         }
 
         if (count < size())
         {
             WarningIn
             (
-                "MeshedSurface::checkPatches()\n"
+                "MeshedSurface::checkRegions()\n"
             )
-                << "more face " << size() << " than patches " << count
-                << " ... extending final patch"
+                << "more face " << size() << " than regions " << count
+                << " ... extending final region"
                 << endl;
 
-            patches_[patches_.size()-1].size() += count - size();
+            regions_[regions_.size()-1].size() += count - size();
         }
         else if (count > size())
         {
             FatalErrorIn
             (
-                "MeshedSurface::checkPatches()\n"
+                "MeshedSurface::checkRegions()\n"
             )
-                << "more patches " << count << " than faces " << size()
+                << "more regions " << count << " than faces " << size()
                 << exit(FatalError);
         }
     }
@@ -534,33 +535,33 @@ void Foam::MeshedSurface<Face>::remapFaces
     const UList<label>& faceMap
 )
 {
-    // recalculate the patch start/size
+    // recalculate the region start/size
     if (&faceMap && faceMap.size())
     {
-        if (patches_.empty())
+        if (regions_.empty())
         {
-            onePatch();
+            oneRegion();
         }
-        else if (patches_.size() == 1)
+        else if (regions_.size() == 1)
         {
-            // optimized for one-patch case
-            patches_[0].size() = faceMap.size();
+            // optimized for single region case
+            regions_[0].size() = faceMap.size();
         }
         else
         {
             label newFaceI = 0;
-            label oldPatchEnd = 0;
-            forAll(patches_, patchI)
+            label origEndI = 0;
+            forAll(regions_, regionI)
             {
-                surfGroup& p = patches_[patchI];
+                surfRegion& reg = regions_[regionI];
 
-                // adjust patch start
-                p.start() = newFaceI;
-                oldPatchEnd += p.size();
+                // adjust region start
+                reg.start() = newFaceI;
+                origEndI += reg.size();
 
                 for (label faceI = newFaceI; faceI < faceMap.size(); ++faceI)
                 {
-                    if (faceMap[faceI] < oldPatchEnd)
+                    if (faceMap[faceI] < origEndI)
                     {
                         ++newFaceI;
                     }
@@ -570,8 +571,8 @@ void Foam::MeshedSurface<Face>::remapFaces
                     }
                 }
 
-                // adjust patch size
-                p.size() = newFaceI - p.start();
+                // adjust region size
+                reg.size() = newFaceI - reg.start();
             }
         }
     }
@@ -586,14 +587,14 @@ template<class Face>
 void Foam::MeshedSurface<Face>::clear()
 {
     ParentType::clear();
-    patches_.clear();
+    regions_.clear();
 }
 
 
 template<class Face>
 Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
 (
-    const UList<bool>& include,
+    const labelHashSet& include,
     labelList& pointMap,
     labelList& faceMap
 ) const
@@ -603,7 +604,7 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
 
 
     // Fill pointMap, faceMap
-    this->subsetMap(include, pointMap, faceMap);
+    PatchTools::subsetMap(*this, include, pointMap, faceMap);
 
     // Create compact coordinate list and forward mapping array
     pointField newPoints(pointMap.size());
@@ -614,11 +615,11 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
         oldToNew[pointMap[pointI]] = pointI;
     }
 
-    // create/copy a new patch list, each patch with zero size
-    surfGroupList newPatches(patches_);
-    forAll(newPatches, patchI)
+    // create/copy a new region list, each region with zero size
+    surfRegionList newRegions(regions_);
+    forAll(newRegions, regionI)
     {
-        newPatches[patchI].size() = 0;
+        newRegions[regionI].size() = 0;
     }
 
     // Renumber face node labels
@@ -637,22 +638,22 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
     }
     oldToNew.clear();
 
-    // recalculate the patch start/size
+    // recalculate the region start/size
     label newFaceI = 0;
-    label oldPatchEnd = 0;
+    label origEndI = 0;
 
-    // adjust patch sizes
-    forAll(newPatches, patchI)
+    // adjust region sizes
+    forAll(newRegions, regionI)
     {
-        surfGroup& p = newPatches[patchI];
+        surfRegion& reg = newRegions[regionI];
 
-        // adjust patch start
-        p.start() = newFaceI;
-        oldPatchEnd += p.size();
+        // adjust region start
+        reg.start() = newFaceI;
+        origEndI += reg.size();
 
         for (label faceI = newFaceI; faceI < faceMap.size(); ++faceI)
         {
-            if (faceMap[faceI] < oldPatchEnd)
+            if (faceMap[faceI] < origEndI)
             {
                 ++newFaceI;
             }
@@ -662,8 +663,8 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
             }
         }
 
-        // adjust patch size
-        p.size() = newFaceI - p.start();
+        // adjust region size
+        reg.size() = newFaceI - reg.start();
     }
 
 
@@ -672,15 +673,16 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
     (
         xferMove(newPoints),
         xferMove(newFaces),
-        xferMove(newPatches)
+        xferMove(newRegions)
     );
 }
 
 
 template<class Face>
-Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
+Foam::MeshedSurface<Face>
+Foam::MeshedSurface<Face>::subsetMesh
 (
-    const UList<bool>& include
+    const labelHashSet& include
 ) const
 {
     labelList pointMap, faceMap;
@@ -689,85 +691,85 @@ Foam::MeshedSurface<Face> Foam::MeshedSurface<Face>::subsetMesh
 
 
 template<class Face>
-void Foam::MeshedSurface<Face>::addPatches
+void Foam::MeshedSurface<Face>::addRegions
 (
-    const UList<surfGroup>& patches,
+    const UList<surfRegion>& regions,
     const bool cullEmpty
 )
 {
-    label nPatch = 0;
+    label nRegion = 0;
 
-    patches_.setSize(patches.size());
-    forAll(patches_, patchI)
+    regions_.setSize(regions.size());
+    forAll(regions_, regionI)
     {
-        if (patches[patchI].size() || !cullEmpty)
+        if (regions[regionI].size() || !cullEmpty)
         {
-            patches_[nPatch] = surfGroup(patches[patchI], nPatch);
-            nPatch++;
+            regions_[nRegion] = surfRegion(regions[regionI], nRegion);
+            nRegion++;
         }
     }
-    patches_.setSize(nPatch);
+    regions_.setSize(nRegion);
 }
 
 
 template<class Face>
-void Foam::MeshedSurface<Face>::addPatches
+void Foam::MeshedSurface<Face>::addRegions
 (
     const UList<label>& sizes,
     const UList<word>& names,
     const bool cullEmpty
 )
 {
-    label start  = 0;
-    label nPatch = 0;
+    label start   = 0;
+    label nRegion = 0;
 
-    patches_.setSize(sizes.size());
-    forAll(patches_, patchI)
+    regions_.setSize(sizes.size());
+    forAll(regions_, regionI)
     {
-        if (sizes[patchI] || !cullEmpty)
+        if (sizes[regionI] || !cullEmpty)
         {
-            patches_[nPatch] = surfGroup
+            regions_[nRegion] = surfRegion
             (
-                names[patchI],
-                sizes[patchI],
+                names[regionI],
+                sizes[regionI],
                 start,
-                nPatch
+                nRegion
             );
-            start += sizes[patchI];
-            nPatch++;
+            start += sizes[regionI];
+            nRegion++;
         }
     }
-    patches_.setSize(nPatch);
+    regions_.setSize(nRegion);
 }
 
 
 template<class Face>
-void Foam::MeshedSurface<Face>::addPatches
+void Foam::MeshedSurface<Face>::addRegions
 (
     const UList<label>& sizes,
     const bool cullEmpty
 )
 {
-    label start  = 0;
-    label nPatch = 0;
+    label start   = 0;
+    label nRegion = 0;
 
-    patches_.setSize(sizes.size());
-    forAll(patches_, patchI)
+    regions_.setSize(sizes.size());
+    forAll(regions_, regionI)
     {
-        if (sizes[patchI] || !cullEmpty)
+        if (sizes[regionI] || !cullEmpty)
         {
-            patches_[nPatch] = surfGroup
+            regions_[nRegion] = surfRegion
             (
-                word("patch") + ::Foam::name(nPatch),
-                sizes[patchI],
+                word("region") + ::Foam::name(nRegion),
+                sizes[regionI],
                 start,
-                nPatch
+                nRegion
             );
-            start += sizes[patchI];
-            nPatch++;
+            start += sizes[regionI];
+            nRegion++;
         }
     }
-    patches_.setSize(nPatch);
+    regions_.setSize(nRegion);
 }
 
 
@@ -778,7 +780,7 @@ void Foam::MeshedSurface<Face>::transfer
 )
 {
     reset(xferMove(surf.storedPoints()), xferMove(surf.storedFaces()));
-    patches_.transfer(surf.patches_);
+    regions_.transfer(surf.regions_);
 
     surf.clear();
 }
@@ -793,7 +795,7 @@ void Foam::MeshedSurface<Face>::transfer
     clear();
 
     labelList faceMap;
-    surfGroupList patchLst = surf.sortedRegions(faceMap);
+    surfRegionList regionLst = surf.sortedRegions(faceMap);
     List<Face>& oldFaces = surf.storedFaces();
 
     List<Face> newFaces(faceMap.size());
@@ -804,7 +806,7 @@ void Foam::MeshedSurface<Face>::transfer
     faceMap.clear();
 
     reset(xferMove(surf.storedPoints()), xferMove(newFaces));
-    patches_.transfer(patchLst);
+    regions_.transfer(regionLst);
 
     surf.clear();
 }
@@ -864,7 +866,7 @@ void Foam::MeshedSurface<Face>::operator=(const MeshedSurface& surf)
 
     this->storedPoints() = surf.points();
     this->storedFaces()  = surf.faces();
-    patches_ = surf.patches_;
+    regions_ = surf.regions_;
 }
 
 // * * * * * * * * * * * * * * * Friend Functions  * * * * * * * * * * * * * //
diff --git a/src/surfMesh/MeshedSurface/MeshedSurface.H b/src/surfMesh/MeshedSurface/MeshedSurface.H
index e2a1c008fa..493a7ffece 100644
--- a/src/surfMesh/MeshedSurface/MeshedSurface.H
+++ b/src/surfMesh/MeshedSurface/MeshedSurface.H
@@ -26,13 +26,13 @@ Class
     Foam::MeshedSurface
 
 Description
-    A surface geometry mesh with patch information, not to be confused
+    A surface geometry mesh with region information, not to be confused
     with a similarily named surfaceMesh, which actually refers to
     the cell faces of a volume mesh.
 
    The MeshedSurface is intended to surfaces from a variety of sources.
-   - A set of points and faces without any patch information.
-   - A set of points and faces with randomly sorted patch information.
+   - A set of points and faces without any region information.
+   - A set of points and faces with randomly sorted region information.
      This could arise, for example, from reading external file formats
      such as STL, etc.
 
@@ -45,7 +45,7 @@ SourceFiles
 #define MeshedSurface_H
 
 #include "BasicMeshedSurface.H"
-#include "surfGroupList.H"
+#include "surfRegionList.H"
 #include "surfaceFormatsCore.H"
 #include "runTimeSelectionTables.H"
 #include "memberFunctionSelectionTables.H"
@@ -88,9 +88,9 @@ private:
 
     // Private Member Data
 
-        //- Patch information (face ordering nFaces/startFace only used
-        //  during reading and writing)
-        List<surfGroup> patches_;
+        //- Region information
+        // (face ordering nFaces/startFace only used during reading/writing)
+        List<surfRegion> regions_;
 
     // Private member functions
 
@@ -101,8 +101,8 @@ protected:
 
     // Protected Member functions
 
-        //- basic sanity check on patches
-        void checkPatches();
+        //- basic sanity check on regions
+        void checkRegions();
 
         //- sort faces by regions and store sorted faces
         void sortFacesAndStore
@@ -139,22 +139,22 @@ public:
         //- Construct null
         MeshedSurface();
 
-        //- Construct by transferring components (points, faces, patches).
+        //- Construct by transferring components (points, faces, regions).
         MeshedSurface
         (
             const Xfer<pointField>&,
             const Xfer<List<Face> >&,
-            const Xfer<surfGroupList>&
+            const Xfer<surfRegionList>&
         );
 
         //- Construct by transferring points, faces.
-        //  Use patch information, or set single default patch.
+        //  Use region information, or set single default region.
         MeshedSurface
         (
             const Xfer<pointField>&,
             const Xfer<List<Face> >&,
-            const UList<label>& patchSizes = UList<label>::null(),
-            const UList<word>& patchNames = UList<word>::null()
+            const UList<label>& regionSizes = UList<label>::null(),
+            const UList<word>& regionNames = UList<word>::null()
         );
 
         //- Construct from a boundary mesh with local points/faces
@@ -250,31 +250,31 @@ public:
             return ParentType::size();
         }
 
-        const List<surfGroup>& patches() const
+        const List<surfRegion>& regions() const
         {
-            return patches_;
+            return regions_;
         }
 
-        //- set a single patch, optionally with a specific name
-        void onePatch(const word& name = word::null);
+        //- set a single region, optionally with a specific name
+        void oneRegion(const word& name = word::null);
 
-        //- add patches
-        void addPatches
+        //- Add regions
+        void addRegions
         (
-            const UList<surfGroup>&,
+            const UList<surfRegion>&,
             const bool cullEmpty=false
         );
 
-        //- add patches
-        void addPatches
+        //- Add regions
+        void addRegions
         (
             const UList<label>& sizes,
             const UList<word>& names,
             const bool cullEmpty=false
         );
 
-        //- add patches
-        void addPatches
+        //- Add regions
+        void addRegions
         (
             const UList<label>& sizes,
             const bool cullEmpty=false
@@ -289,7 +289,7 @@ public:
         //  Returns return pointMap, faceMap from subsetMeshMap
         MeshedSurface subsetMesh
         (
-            const UList<bool>& include,
+            const labelHashSet& include,
             labelList& pointMap,
             labelList& faceMap
         ) const;
@@ -297,7 +297,7 @@ public:
         //- Return new surface.
         MeshedSurface subsetMesh
         (
-            const UList<bool>& include
+            const labelHashSet& include
         ) const;
 
         //- Transfer the contents of the argument and annull the argument
diff --git a/src/surfMesh/MeshedSurface/MeshedSurfaceIO.C b/src/surfMesh/MeshedSurface/MeshedSurfaceIO.C
index 0d147477c4..76e3a23f60 100644
--- a/src/surfMesh/MeshedSurface/MeshedSurfaceIO.C
+++ b/src/surfMesh/MeshedSurface/MeshedSurfaceIO.C
@@ -37,16 +37,16 @@ bool Foam::MeshedSurface<Face>::read(Istream& is)
 {
     clear();
 
-    List<surfGroup> patchLst(is);
+    List<surfRegion> regionLst(is);
 
     // copy and set the indices
-    patches_.setSize(patchLst.size());
-    forAll(patchLst, patchI)
+    regions_.setSize(regionLst.size());
+    forAll(regionLst, regionI)
     {
-        patches_[patchI] = surfGroup
+        regions_[regionI] = surfRegion
         (
-            patchLst[patchI],
-            patchI
+            regionLst[regionI],
+            regionI
         );
     }
 
@@ -64,11 +64,11 @@ bool Foam::MeshedSurface<Face>::read(Istream& is)
             Xfer<pointField>::null(),
             faceLst.xfer()
         );
-        surf.addPatches(patches_);
+        surf.addRegions(regions_);
 
         // this will break if the triangulation needed points
         surf.triangulate();
-        patches_ = surf.patches();
+        regions_ = surf.regions();
 
         // transcribe from face -> triFace (Face)
         const List<face>& origFaces = surf.faces();
@@ -102,11 +102,11 @@ void Foam::MeshedSurface<Face>::write(Ostream& os) const
     os  << "// OpenFOAM Surface Format" << nl
         << "// ~~~~~~~~~~~~~~~~~~~~~~~" << nl
         << "// regions:" << nl
-        << patches_.size() << nl << token::BEGIN_LIST << incrIndent << nl;
+        << regions_.size() << nl << token::BEGIN_LIST << incrIndent << nl;
 
-    forAll(patches_, patchI)
+    forAll(regions_, regionI)
     {
-        patches_[patchI].writeDict(os);
+        regions_[regionI].writeDict(os);
     }
     os  << decrIndent << token::END_LIST << nl;
 
diff --git a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.C b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.C
index cb1997c225..5f762d929a 100644
--- a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.C
+++ b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.C
@@ -26,6 +26,7 @@ License
 
 #include "MeshedSurface.H"
 #include "UnsortedMeshedSurface.H"
+#include "PrimitivePatchTools.H"
 #include "IFstream.H"
 #include "OFstream.H"
 #include "Time.H"
@@ -164,12 +165,12 @@ Foam::UnsortedMeshedSurface<Face>::UnsortedMeshedSurface
     const Xfer<pointField>& pointLst,
     const Xfer<List<Face> >& faceLst,
     const Xfer<List<label> >& regionIds,
-    const Xfer<surfPatchIdentifierList>& patchLst
+    const Xfer<surfRegionIdentifierList>& regionTofc
 )
 :
     ParentType(pointLst, faceLst),
-    regions_(regionIds),
-    patches_(patchLst)
+    regionIds_(regionIds),
+    regionToc_(regionTofc)
 {}
 
 
@@ -178,26 +179,26 @@ Foam::UnsortedMeshedSurface<Face>::UnsortedMeshedSurface
 (
     const Xfer<pointField>& pointLst,
     const Xfer<List<Face> >& faceLst,
-    const UList<label>& patchSizes,
-    const UList<word>& patchNames
+    const UList<label>& regionSizes,
+    const UList<word>& regionNames
 )
 :
     ParentType(pointLst, faceLst)
 {
-    if (&patchSizes)
+    if (&regionSizes)
     {
-        if (&patchNames)
+        if (&regionNames)
         {
-            setPatches(patchSizes, patchNames);
+            setRegions(regionSizes, regionNames);
         }
         else
         {
-            setPatches(patchSizes);
+            setRegions(regionSizes);
         }
     }
     else
     {
-        onePatch();
+        oneRegion();
     }
 }
 
@@ -223,7 +224,7 @@ Foam::UnsortedMeshedSurface<Face>::UnsortedMeshedSurface
 :
     ParentType(xferCopy(surf.points()), xferCopy(surf.faces()))
 {
-    setPatches(surf.patches());
+    setRegions(surf.regions());
 }
 
 
@@ -266,8 +267,8 @@ Foam::UnsortedMeshedSurface<Face>::UnsortedMeshedSurface
 )
 :
     ParentType(xferCopy(surf.points()), xferCopy(surf.faces())),
-    regions_(surf.regions_),
-    patches_(surf.patches_)
+    regionIds_(surf.regionIds_),
+    regionToc_(surf.regionToc_)
 {}
 
 
@@ -296,101 +297,105 @@ template<class Face>
 Foam::UnsortedMeshedSurface<Face>::~UnsortedMeshedSurface()
 {}
 
+
 // * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
 
 // * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
 template<class Face>
-void Foam::UnsortedMeshedSurface<Face>::onePatch(const word& name)
+void Foam::UnsortedMeshedSurface<Face>::oneRegion(const word& name)
 {
-    regions_.setSize(size());
-    regions_ = 0;
+    regionIds_.setSize(size());
+    regionIds_ = 0;
 
-    word patchName(name);
-    if (patchName.empty())
+    word regionName(name);
+    if (regionName.empty())
     {
-        if (patches_.size())
+        if (regionToc_.size())
         {
-            patchName = patches_[0].name();
+            regionName = regionToc_[0].name();
         }
-        if (patchName.empty())
+        if (regionName.empty())
         {
-            patchName = "patch0";
+            regionName = "region0";
         }
     }
 
-    // set single default patch
-    patches_.setSize(1);
-    patches_[0] = surfPatchIdentifier(patchName, 0);
+    // set single default region
+    regionToc_.setSize(1);
+    regionToc_[0] = surfRegionIdentifier(regionName, 0);
 }
 
 
 template<class Face>
-void Foam::UnsortedMeshedSurface<Face>::setPatches
+void Foam::UnsortedMeshedSurface<Face>::setRegions
 (
-    const surfGroupList& patches
+    const surfRegionList& regionLst
 )
 {
-    regions_.setSize(size());
-    patches_.setSize(patches.size());
+    regionIds_.setSize(size());
+    regionToc_.setSize(regionLst.size());
 
-    forAll(patches, patchI)
+    forAll(regionToc_, regionI)
     {
-        const surfGroup& p = patches[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        patches_[patchI] = p;
+        regionToc_[regionI] = reg;
 
-        SubList<label> subRegion(regions_, p.size(), p.start());
-        subRegion = patchI;
+        // assign sub-region Ids
+        SubList<label> subRegion(regionIds_, reg.size(), reg.start());
+        subRegion = regionI;
     }
 }
 
 
 template<class Face>
-void Foam::UnsortedMeshedSurface<Face>::setPatches
+void Foam::UnsortedMeshedSurface<Face>::setRegions
 (
     const UList<label>& sizes,
     const UList<word>& names
 )
 {
-    regions_.setSize(size());
-    patches_.setSize(sizes.size());
+    regionIds_.setSize(size());
+    regionToc_.setSize(sizes.size());
 
     label start = 0;
-    forAll(patches_, patchI)
+    forAll(regionToc_, regionI)
     {
-        patches_[patchI] = surfPatchIdentifier(names[patchI], patchI);
+        regionToc_[regionI] = surfRegionIdentifier(names[regionI], regionI);
 
-        SubList<label> subRegion(regions_, sizes[patchI], start);
-        subRegion = patchI;
+        // assign sub-region Ids
+        SubList<label> subRegion(regionIds_, sizes[regionI], start);
+        subRegion = regionI;
 
-        start += sizes[patchI];
+        start += sizes[regionI];
     }
 }
 
 
 template<class Face>
-void Foam::UnsortedMeshedSurface<Face>::setPatches
+void Foam::UnsortedMeshedSurface<Face>::setRegions
 (
     const UList<label>& sizes
 )
 {
-    regions_.setSize(size());
-    patches_.setSize(sizes.size());
+    regionIds_.setSize(size());
+    regionToc_.setSize(sizes.size());
 
     label start = 0;
-    forAll(patches_, patchI)
+    forAll(regionToc_, regionI)
     {
-        patches_[patchI] = surfPatchIdentifier
+        regionToc_[regionI] = surfRegionIdentifier
         (
-            word("patch") + ::Foam::name(patchI),
-            patchI
+            word("region") + ::Foam::name(regionI),
+            regionI
         );
 
-        SubList<label> subRegion(regions_, sizes[patchI], start);
-        subRegion = patchI;
+        // assign sub-region Ids
+        SubList<label> subRegion(regionIds_, sizes[regionI], start);
+        subRegion = regionI;
 
-        start += sizes[patchI];
+        start += sizes[regionI];
     }
 }
 
@@ -404,14 +409,14 @@ void Foam::UnsortedMeshedSurface<Face>::remapFaces
     // re-assign the region Ids
     if (&faceMap && faceMap.size())
     {
-        if (patches_.empty())
+        if (regionToc_.empty())
         {
-            onePatch();
+            oneRegion();
         }
-        else if (patches_.size() == 1)
+        else if (regionToc_.size() == 1)
         {
-            // optimized for one-patch case
-            regions_ = 0;
+            // optimized for single-region case
+            regionIds_ = 0;
         }
         else
         {
@@ -419,9 +424,9 @@ void Foam::UnsortedMeshedSurface<Face>::remapFaces
 
             forAll(faceMap, faceI)
             {
-                newRegions[faceI] = regions_[faceMap[faceI]];
+                newRegions[faceI] = regionIds_[faceMap[faceI]];
             }
-            regions_.transfer(newRegions);
+            regionIds_.transfer(newRegions);
         }
     }
 }
@@ -433,8 +438,8 @@ template<class Face>
 void Foam::UnsortedMeshedSurface<Face>::setSize(const label s)
 {
     ParentType::setSize(s);
-    // if regions extend: set with last patchId
-    regions_.setSize(s, patches_.size() - 1);
+    // if regions extend: set with last regionId
+    regionIds_.setSize(s, regionToc_.size() - 1);
 }
 
 
@@ -442,32 +447,32 @@ template<class Face>
 void Foam::UnsortedMeshedSurface<Face>::clear()
 {
     ParentType::clear();
-    regions_.clear();
-    patches_.clear();
+    regionIds_.clear();
+    regionToc_.clear();
 }
 
 
 template<class Face>
-Foam::surfGroupList Foam::UnsortedMeshedSurface<Face>::sortedRegions
+Foam::surfRegionList Foam::UnsortedMeshedSurface<Face>::sortedRegions
 (
     labelList& faceMap
 ) const
 {
-    // supply some patch names
-    Map<word> patchNames;
-    forAll(patches_, patchI)
+    // supply some region names
+    Map<word> regionNames;
+    forAll(regionToc_, regionI)
     {
-        patchNames.insert(patchI, patches_[patchI].name());
+        regionNames.insert(regionI, regionToc_[regionI].name());
     }
 
-    return sortedPatchRegions(regions_, patchNames, faceMap);
+    return sortedRegionsById(regionIds_, regionNames, faceMap);
 }
 
 
 template<class Face>
 Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
 (
-    const UList<bool>& include,
+    const labelHashSet& include,
     labelList& pointMap,
     labelList& faceMap
 ) const
@@ -476,7 +481,7 @@ Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
     const List<Face>&  locFaces  = this->localFaces();
 
     // Fill pointMap, faceMap
-    this->subsetMap(include, pointMap, faceMap);
+    PatchTools::subsetMap(*this, include, pointMap, faceMap);
 
     // Create compact coordinate list and forward mapping array
     pointField newPoints(pointMap.size());
@@ -503,7 +508,7 @@ Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
             f[fp] = oldToNew[f[fp]];
         }
 
-        newRegions[faceI] = regions_[origFaceI];
+        newRegions[faceI] = regionIds_[origFaceI];
     }
     oldToNew.clear();
 
@@ -513,7 +518,7 @@ Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
         xferMove(newPoints),
         xferMove(newFaces),
         xferMove(newRegions),
-        xferCopy(patches_)
+        xferCopy(regionToc_)
     );
 }
 
@@ -521,7 +526,7 @@ Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
 template<class Face>
 Foam::UnsortedMeshedSurface<Face> Foam::UnsortedMeshedSurface<Face>::subsetMesh
 (
-    const UList<bool>& include
+    const labelHashSet& include
 ) const
 {
     labelList pointMap, faceMap;
@@ -541,7 +546,7 @@ void Foam::UnsortedMeshedSurface<Face>::reset
 
     if (&regionIds)
     {
-        regions_.transfer(regionIds());
+        regionIds_.transfer(regionIds());
     }
 }
 
@@ -556,9 +561,9 @@ void Foam::UnsortedMeshedSurface<Face>::transfer
     (
         xferMove(surf.storedPoints()),
         xferMove(surf.storedFaces()),
-        xferMove(surf.regions_)
+        xferMove(surf.regionIds_)
     );
-    patches_.transfer(surf.patches_);
+    regionToc_.transfer(surf.regionToc_);
 
     surf.clear();
 }
@@ -571,7 +576,7 @@ void Foam::UnsortedMeshedSurface<Face>::transfer
 )
 {
     reset(xferMove(surf.storedPoints()), xferMove(surf.storedFaces()));
-    setPatches(surf.patches());
+    setRegions(surf.regions());
     surf.clear();
 }
 
@@ -634,8 +639,8 @@ void Foam::UnsortedMeshedSurface<Face>::operator=
 
     this->storedPoints() = surf.points();
     this->storedFaces()  = surf.faces();
-    regions_ = surf.regions_;
-    patches_ = surf.patches_;
+    regionIds_ = surf.regionIds_;
+    regionToc_ = surf.regionToc_;
 }
 
 
diff --git a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
index bd692647ab..8caabb0776 100644
--- a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
+++ b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
@@ -26,18 +26,18 @@ Class
     Foam::UnsortedMeshedSurface
 
 Description
-    A surface geometry mesh, in which the patch information is conveyed by
-    the 'region' associated with each face.
+    A surface geometry mesh, in which the region information is conveyed by
+    the 'regionId' associated with each face.
 
     This form of surface description is particularly useful for reading in
     surface meshes from third-party formats (eg, obj, stl, gts, etc.). It
     can also be particularly useful for situations in which the surface
     many be adjusted in an arbitrary manner without worrying about needed
-    to adjust the patch information (eg, surface refinement).
+    to adjust the region information (eg, surface refinement).
 
 See Also
-    The Foam::meshedSurface - which is organized as a surface mesh, but
-    with independent patch information.
+    The Foam::MeshedSurface - which is organized as a surface mesh, but
+    with independent region information.
 
 SourceFiles
     UnsortedMeshedSurface.C
@@ -48,8 +48,8 @@ SourceFiles
 #define UnsortedMeshedSurface_H
 
 #include "BasicMeshedSurface.H"
-#include "surfPatchIdentifierList.H"
-#include "surfGroupList.H"
+#include "surfRegionIdentifierList.H"
+#include "surfRegionList.H"
 #include "surfaceFormatsCore.H"
 #include "runTimeSelectionTables.H"
 #include "memberFunctionSelectionTables.H"
@@ -70,7 +70,7 @@ template<class Face> class MeshedSurface;
 class polyBoundaryMesh;
 
 template<class Face>
-    Ostream& operator<<(Ostream&, const UnsortedMeshedSurface<Face>&);
+Ostream& operator<<(Ostream&, const UnsortedMeshedSurface<Face>&);
 
 
 /*---------------------------------------------------------------------------*\
@@ -93,12 +93,12 @@ private:
 
     // Private Member Data
 
-        //- The regions associated with the faces
-        labelList regions_;
+        //- The region Ids associated with the faces
+        labelList regionIds_;
 
-        //- Patch information (face ordering nFaces/startFace only used
+        //- Region information (face ordering nFaces/startFace only used
         //  during reading and writing)
-        List<surfPatchIdentifier> patches_;
+        List<surfRegionIdentifier> regionToc_;
 
     // Private member functions
 
@@ -115,16 +115,16 @@ protected:
 
     // Protected Member functions
 
-        //- Return non-const access to the faces
-        List<label>& storedRegions()
+        //- Return non-const access to the region Ids
+        List<label>& storedRegionIds()
         {
-            return regions_;
+            return regionIds_;
         }
 
-        //- Return non-const access to the patches
-        List<surfPatchIdentifier>& storedPatches()
+        //- Return non-const access to the region table-of-contents
+        List<surfRegionIdentifier>& storedRegionToc()
         {
-            return patches_;
+            return regionToc_;
         }
 
         //- Set new regions from faceMap
@@ -155,23 +155,23 @@ public:
         UnsortedMeshedSurface();
 
         //- Construct by transferring components
-        //  (points, faces, region ids, patches).
+        //  (points, faces, region ids, region info).
         UnsortedMeshedSurface
         (
             const Xfer<pointField>&,
             const Xfer<List<Face> >&,
             const Xfer<List<label> >& regionIds,
-            const Xfer<surfPatchIdentifierList>&
+            const Xfer<surfRegionIdentifierList>&
         );
 
         //- Construct by transferring points, faces.
-        //  Use patch information, or set single default patch
+        //  Use region information, or set single default region
         UnsortedMeshedSurface
         (
             const Xfer<pointField>&,
             const Xfer<List<Face> >&,
-            const UList<label>& patchSizes = UList<label>::null(),
-            const UList<word>& patchNames = UList<word>::null()
+            const UList<label>& regionSizes = UList<label>::null(),
+            const UList<word>& regionNames = UList<word>::null()
         );
 
         //- Construct from a boundary mesh with local points/faces
@@ -267,34 +267,34 @@ public:
         //- Reset size of face and region list
         void setSize(const label);
 
-        //- Return const access to the regions
-        const List<label>& regions() const
+        //- Return const access to the regions ids
+        const List<label>& regionIds() const
         {
-            return regions_;
+            return regionIds_;
         }
 
-        //- Return const access to the patches
-        const List<surfPatchIdentifier>& patches() const
+        //- Return const access to the region table-of-contents
+        const List<surfRegionIdentifier>& regionToc() const
         {
-            return patches_;
+            return regionToc_;
         }
 
         //- Sort faces according to region.
-        //  Returns patch list and sets faceMap to index within faces()
-        List<surfGroup> sortedRegions(labelList& faceMap) const;
+        //  Returns a surfRegionList and sets faceMap to index within faces()
+        surfRegionList sortedRegions(labelList& faceMap) const;
 
-        //- Set regions to 0 and set a single patch
+        //- Set regions to 0 and set a single region
         //  Optionally with a specific name
-        void onePatch(const word& name = word::null);
+        void oneRegion(const word& name = word::null);
 
-        //- Set regions and patches
-        void setPatches(const surfGroupList&);
+        //- Set region ids and regions
+        void setRegions(const surfRegionList&);
 
-        //- Set regions and patches
-        void setPatches(const UList<label>& sizes, const UList<word>& names);
+        //- Set region ids and regions
+        void setRegions(const UList<label>& sizes, const UList<word>& names);
 
-        //- Set regions and patches with default names
-        void setPatches(const UList<label>& sizes);
+        //- Set region ids and set regions with default names
+        void setRegions(const UList<label>& sizes);
 
 
     // Edit
@@ -306,7 +306,7 @@ public:
         //  Returns return pointMap, faceMap from subsetMeshMap
         UnsortedMeshedSurface subsetMesh
         (
-            const UList<bool>& include,
+            const labelHashSet& include,
             labelList& pointMap,
             labelList& faceMap
         ) const;
@@ -314,7 +314,7 @@ public:
         //- Return new surface.
         UnsortedMeshedSurface subsetMesh
         (
-            const UList<bool>& include
+            const labelHashSet& include
         ) const;
 
         //- Transfer components (points, faces, region ids).
diff --git a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurfaceIO.C b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurfaceIO.C
index 6a05b7e3d3..70049bd020 100644
--- a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurfaceIO.C
+++ b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurfaceIO.C
@@ -49,18 +49,18 @@ void Foam::UnsortedMeshedSurface<Face>::write(Ostream& os) const
     const List<Face>& faceLst = this->faces();
 
     labelList faceMap;
-    List<surfGroup> patchLst = sortedRegions(faceMap);
+    surfRegionList regionLst = sortedRegions(faceMap);
 
     // just emit some information until we get a nice IOobject
     IOobject::writeBanner(os);
     os  << "// OpenFOAM Surface Format" << nl
         << "// ~~~~~~~~~~~~~~~~~~~~~~~" << nl
         << "// regions:" << nl
-        << patchLst.size() << nl << token::BEGIN_LIST << incrIndent << nl;
+        << regionLst.size() << nl << token::BEGIN_LIST << incrIndent << nl;
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        patchLst[patchI].writeDict(os);
+        regionLst[regionI].writeDict(os);
     }
     os  << decrIndent << token::END_LIST << nl;
 
@@ -74,12 +74,12 @@ void Foam::UnsortedMeshedSurface<Face>::write(Ostream& os) const
     os  << faceLst.size() << nl << token::BEGIN_LIST << nl;
 
     label faceI = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
         // Print all faces belonging to this region
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             os << faceLst[faceMap[faceI++]] << nl;
         }
diff --git a/src/surfMesh/surfGroup/surfGroup.C b/src/surfMesh/surfRegion/surfRegion/surfRegion.C
similarity index 65%
rename from src/surfMesh/surfGroup/surfGroup.C
rename to src/surfMesh/surfRegion/surfRegion/surfRegion.C
index 750c238e76..8c7e3a23a3 100644
--- a/src/surfMesh/surfGroup/surfGroup.C
+++ b/src/surfMesh/surfRegion/surfRegion/surfRegion.C
@@ -26,28 +26,28 @@ Description
 
 \*---------------------------------------------------------------------------*/
 
-#include "surfGroup.H"
+#include "surfRegion.H"
 #include "dictionary.H"
 #include "word.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
-defineTypeNameAndDebug(Foam::surfGroup, 0);
+defineTypeNameAndDebug(Foam::surfRegion, 0);
 
 
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::surfGroup::surfGroup()
+Foam::surfRegion::surfRegion()
 :
-    surfPatchIdentifier(),
+    surfRegionIdentifier(),
     size_(0),
     start_(0)
 {}
 
 
 
-Foam::surfGroup::surfGroup
+Foam::surfRegion::surfRegion
 (
     const word& name,
     const label size,
@@ -56,68 +56,68 @@ Foam::surfGroup::surfGroup
     const word& geometricType
 )
 :
-    surfPatchIdentifier(name, index, geometricType),
+    surfRegionIdentifier(name, index, geometricType),
     size_(size),
     start_(start)
 {}
 
 
-Foam::surfGroup::surfGroup(Istream& is, const label index)
+Foam::surfRegion::surfRegion(Istream& is, const label index)
 :
-    surfPatchIdentifier(),
+    surfRegionIdentifier(),
     size_(0),
     start_(0)
 {
     word name(is);
     dictionary dict(is);
 
-    operator=(surfGroup(name, dict, index));
+    operator=(surfRegion(name, dict, index));
 }
 
 
-Foam::surfGroup::surfGroup
+Foam::surfRegion::surfRegion
 (
     const word& name,
     const dictionary& dict,
     const label index
 )
 :
-    surfPatchIdentifier(name, dict, index),
+    surfRegionIdentifier(name, dict, index),
     size_(readLabel(dict.lookup("nFaces"))),
     start_(readLabel(dict.lookup("startFace")))
 {}
 
 
-Foam::surfGroup::surfGroup(const surfGroup& p)
+Foam::surfRegion::surfRegion(const surfRegion& reg)
 :
-    surfPatchIdentifier(p, p.index()),
-    size_(p.size()),
-    start_(p.start())
+    surfRegionIdentifier(reg, reg.index()),
+    size_(reg.size()),
+    start_(reg.start())
 {}
 
 
-Foam::surfGroup::surfGroup(const surfGroup& p, const label index)
+Foam::surfRegion::surfRegion(const surfRegion& reg, const label index)
 :
-    surfPatchIdentifier(p, index),
-    size_(p.size()),
-    start_(p.start())
+    surfRegionIdentifier(reg, index),
+    size_(reg.size()),
+    start_(reg.start())
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-void Foam::surfGroup::write(Ostream& os) const
+void Foam::surfRegion::write(Ostream& os) const
 {
     writeDict(os);
 }
 
 
-void Foam::surfGroup::writeDict(Ostream& os) const
+void Foam::surfRegion::writeDict(Ostream& os) const
 {
     os  << indent << name() << nl
         << indent << token::BEGIN_BLOCK << incrIndent << nl;
 
-    surfPatchIdentifier::write(os);
+    surfRegionIdentifier::write(os);
     os.writeKeyword("nFaces") << size() << token::END_STATEMENT << nl;
     os.writeKeyword("startFace") << start() << token::END_STATEMENT << nl;
 
@@ -127,38 +127,38 @@ void Foam::surfGroup::writeDict(Ostream& os) const
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
-bool Foam::surfGroup::operator!=(const surfGroup& p) const
+bool Foam::surfRegion::operator!=(const surfRegion& reg) const
 {
-    return !(*this == p);
+    return !(*this == reg);
 }
 
 
-bool Foam::surfGroup::operator==(const surfGroup& p) const
+bool Foam::surfRegion::operator==(const surfRegion& reg) const
 {
     return
     (
-        (geometricType() == p.geometricType())
-     && (size() == p.size())
-     && (start() == p.start())
+        (geometricType() == reg.geometricType())
+     && (size() == reg.size())
+     && (start() == reg.start())
     );
 }
 
 
 // * * * * * * * * * * * * * * * Friend Operators  * * * * * * * * * * * * * //
 
-Foam::Istream& Foam::operator>>(Istream& is, surfGroup& p)
+Foam::Istream& Foam::operator>>(Istream& is, surfRegion& reg)
 {
-    p = surfGroup(is, 0);
+    reg = surfRegion(is, 0);
 
-    is.check("Istream& operator>>(Istream&, surfGroup&)");
+    is.check("Istream& operator>>(Istream&, surfRegion&)");
     return is;
 }
 
 
-Foam::Ostream& Foam::operator<<(Ostream& os, const surfGroup& p)
+Foam::Ostream& Foam::operator<<(Ostream& os, const surfRegion& reg)
 {
-    p.write(os);
-    os.check("Ostream& operator<<(Ostream& f, const surfGroup& p");
+    reg.write(os);
+    os.check("Ostream& operator<<(Ostream&, const surfRegion&");
     return os;
 }
 
diff --git a/src/surfMesh/surfGroup/surfGroup.H b/src/surfMesh/surfRegion/surfRegion/surfRegion.H
similarity index 69%
rename from src/surfMesh/surfGroup/surfGroup.H
rename to src/surfMesh/surfRegion/surfRegion/surfRegion.H
index 15db3809bc..4a5bf62951 100644
--- a/src/surfMesh/surfGroup/surfGroup.H
+++ b/src/surfMesh/surfRegion/surfRegion/surfRegion.H
@@ -23,23 +23,24 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Class
-    Foam::surfGroup
+    Foam::surfRegion
 
 Description
-    'Patch' on surface as subset of triSurface.
+    A region on a meshed surface.
+    Similar in concept to a faceZone on the surface.
 
 SourceFiles
-    surfGroup.C
+    surfRegion.C
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef surfGroup_H
-#define surfGroup_H
+#ifndef surfRegion_H
+#define surfRegion_H
 
 #include "word.H"
 #include "label.H"
 #include "className.H"
-#include "surfPatchIdentifier.H"
+#include "surfRegionIdentifier.H"
 #include "autoPtr.H"
 #include "dictionary.H"
 
@@ -50,18 +51,18 @@ namespace Foam
 
 // Forward declaration of friend functions and operators
 
-class surfGroup;
+class surfRegion;
 
-Istream& operator>>(Istream&, surfGroup&);
-Ostream& operator<<(Ostream&, const surfGroup&);
+Istream& operator>>(Istream&, surfRegion&);
+Ostream& operator<<(Ostream&, const surfRegion&);
 
 /*---------------------------------------------------------------------------*\
-                           Class surfGroup Declaration
+                           Class surfRegion Declaration
 \*---------------------------------------------------------------------------*/
 
-class surfGroup
+class surfRegion
 :
-    public surfPatchIdentifier
+    public surfRegionIdentifier
 {
     // Private data
 
@@ -74,16 +75,16 @@ class surfGroup
 public:
 
     //- Runtime type information
-    ClassName("surfGroup");
+    ClassName("surfRegion");
 
 
     // Constructors
 
         //- Construct null
-        surfGroup();
+        surfRegion();
 
         //- Construct from components
-        surfGroup
+        surfRegion
         (
             const word& name,
             const label size,
@@ -93,10 +94,10 @@ public:
         );
 
         //- Construct from Istream
-        surfGroup(Istream& is, const label index);
+        surfRegion(Istream& is, const label index);
 
         //- Construct from dictionary
-        surfGroup
+        surfRegion
         (
             const word& name,
             const dictionary& dict,
@@ -104,48 +105,48 @@ public:
         );
 
         //- Construct as copy
-        surfGroup(const surfGroup&);
+        surfRegion(const surfRegion&);
 
-        //- Construct from another patch, resetting the index
-        surfGroup(const surfGroup&, const label index);
+        //- Construct from another region, resetting the index
+        surfRegion(const surfRegion&, const label index);
 
         //- Return clone
-        autoPtr<surfGroup> clone() const
+        autoPtr<surfRegion> clone() const
         {
-            notImplemented("autoPtr<surfGroup> clone() const");
-            return autoPtr<surfGroup>(NULL);
+            notImplemented("autoPtr<surfRegion> clone() const");
+            return autoPtr<surfRegion>(NULL);
         }
 
-        static autoPtr<surfGroup> New(Istream& is)
+        static autoPtr<surfRegion> New(Istream& is)
         {
             word name(is);
             dictionary dict(is);
 
-            return autoPtr<surfGroup>(new surfGroup(name, dict, 0));
+            return autoPtr<surfRegion>(new surfRegion(name, dict, 0));
         }
 
 
     // Member Functions
 
-        //- Return start label of this patch in the face list
+        //- Return start label of this region in the face list
         label start() const
         {
             return start_;
         }
 
-        //- Return start label of this patch in the face list
+        //- Return start label of this region in the face list
         label& start()
         {
             return start_;
         }
 
-        //- Return size of this patch in the face list
+        //- Return size of this region in the face list
         label size() const
         {
             return size_;
         }
 
-        //- Return size of this patch in the face list
+        //- Return size of this region in the face list
         label& size()
         {
             return size_;
@@ -160,15 +161,15 @@ public:
 
     // Member Operators
 
-        bool operator!=(const surfGroup&) const;
+        bool operator!=(const surfRegion&) const;
 
         //- compare.
-        bool operator==(const surfGroup&) const;
+        bool operator==(const surfRegion&) const;
 
     // IOstream Operators
 
-        friend Istream& operator>>(Istream&, surfGroup&);
-        friend Ostream& operator<<(Ostream&, const surfGroup&);
+        friend Istream& operator>>(Istream&, surfRegion&);
+        friend Ostream& operator<<(Ostream&, const surfRegion&);
 };
 
 
diff --git a/src/surfMesh/surfGroup/surfGroupIOList.C b/src/surfMesh/surfRegion/surfRegion/surfRegionIOList.C
similarity index 72%
rename from src/surfMesh/surfGroup/surfGroupIOList.C
rename to src/surfMesh/surfRegion/surfRegion/surfRegionIOList.C
index 0adb4c684b..731664ae08 100644
--- a/src/surfMesh/surfGroup/surfGroupIOList.C
+++ b/src/surfMesh/surfRegion/surfRegion/surfRegionIOList.C
@@ -24,71 +24,71 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "surfGroupIOList.H"
+#include "surfRegionIOList.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
-defineTypeNameAndDebug(Foam::surfGroupIOList, 0);
+defineTypeNameAndDebug(Foam::surfRegionIOList, 0);
 
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::surfGroupIOList::surfGroupIOList
+Foam::surfRegionIOList::surfRegionIOList
 (
     const IOobject& io
 )
 :
-    surfGroupList(),
+    surfRegionList(),
     regIOobject(io)
 {
     Foam::string functionName =
-        "surfGroupIOList::surfGroupIOList"
+        "surfRegionIOList::surfRegionIOList"
         "(const IOobject& io)";
 
 
     if (readOpt() == IOobject::MUST_READ)
     {
-        surfGroupList& patches = *this;
+        surfRegionList& regions = *this;
 
         // read polyPatchList
         Istream& is = readStream(typeName);
 
-        PtrList<entry> patchEntries(is);
-        patches.setSize(patchEntries.size());
+        PtrList<entry> dictEntries(is);
+        regions.setSize(dictEntries.size());
 
         label faceI = 0;
-        forAll(patches, patchI)
+        forAll(regions, regionI)
         {
-            const dictionary& dict = patchEntries[patchI].dict();
+            const dictionary& dict = dictEntries[regionI].dict();
 
-            label patchSize  = readLabel(dict.lookup("nFaces"));
+            label regionSize = readLabel(dict.lookup("nFaces"));
             label startFaceI = readLabel(dict.lookup("startFace"));
 
-            patches[patchI] = surfGroup
+            regions[regionI] = surfRegion
             (
-                patchEntries[patchI].keyword(),
-                patchSize,
+                dictEntries[regionI].keyword(),
+                regionSize,
                 startFaceI,
-                patchI
+                regionI
             );
 
             word geoType;
             if (dict.readIfPresent("geometricType", geoType))
             {
-                patches[patchI].geometricType() = geoType;
+                regions[regionI].geometricType() = geoType;
             }
 
             if (startFaceI != faceI)
             {
                 FatalErrorIn(functionName)
-                    << "Patches are not ordered. Start of patch " << patchI
-                    << " does not correspond to sum of preceding patches."
+                    << "Regions are not ordered. Start of region " << regionI
+                    << " does not correspond to sum of preceding regions."
                     << endl
                     << "while reading " << io.objectPath()
                     << exit(FatalError);
             }
 
-            faceI += patchSize;
+            faceI += regionSize;
         }
 
         // Check state of IOstream
@@ -99,20 +99,20 @@ Foam::surfGroupIOList::surfGroupIOList
 }
 
 // Construct from IOObject
-Foam::surfGroupIOList::surfGroupIOList
+Foam::surfRegionIOList::surfRegionIOList
 (
     const IOobject& io,
-    const surfGroupList& patches
+    const surfRegionList& regions
 )
 :
-    surfGroupList(patches),
+    surfRegionList(regions),
     regIOobject(io)
 {}
 
 
 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
-Foam::surfGroupIOList::~surfGroupIOList()
+Foam::surfRegionIOList::~surfRegionIOList()
 {}
 
 
@@ -120,7 +120,7 @@ Foam::surfGroupIOList::~surfGroupIOList()
 
 
 // writeData member function required by regIOobject
-bool Foam::surfGroupIOList::writeData(Ostream& os) const
+bool Foam::surfRegionIOList::writeData(Ostream& os) const
 {
     os << *this;
     return os.good();
@@ -129,13 +129,13 @@ bool Foam::surfGroupIOList::writeData(Ostream& os) const
 
 // * * * * * * * * * * * * * * * Friend Operators  * * * * * * * * * * * * * //
 
-Foam::Ostream& Foam::operator<<(Ostream& os, const surfGroupIOList& patches)
+Foam::Ostream& Foam::operator<<(Ostream& os, const surfRegionIOList& L)
 {
-    os  << patches.size() << nl << token::BEGIN_LIST;
+    os  << L.size() << nl << token::BEGIN_LIST;
 
-    forAll(patches, patchI)
+    forAll(L, i)
     {
-        patches[patchI].writeDict(os);
+        L[i].writeDict(os);
     }
 
     os  << token::END_LIST;
diff --git a/src/surfMesh/surfGroup/surfGroupIOList.H b/src/surfMesh/surfRegion/surfRegion/surfRegionIOList.H
similarity index 79%
rename from src/surfMesh/surfGroup/surfGroupIOList.H
rename to src/surfMesh/surfRegion/surfRegion/surfRegionIOList.H
index 4fffa5edcb..0e1abb2785 100644
--- a/src/surfMesh/surfGroup/surfGroupIOList.H
+++ b/src/surfMesh/surfRegion/surfRegion/surfRegionIOList.H
@@ -23,20 +23,20 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Class
-    Foam::surfGroupIOList
+    Foam::surfRegionIOList
 
 Description
-    IOobject for a surfGroupList
+    IOobject for a surfRegionList
 
 SourceFiles
-    surfGroupIOList.C
+    surfRegionIOList.C
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef surfGroupIOList_H
-#define surfGroupIOList_H
+#ifndef surfRegionIOList_H
+#define surfRegionIOList_H
 
-#include "surfGroupList.H"
+#include "surfRegionList.H"
 #include "regIOobject.H"
 #include "faceList.H"
 #include "className.H"
@@ -49,12 +49,12 @@ namespace Foam
 // Forward declaration of classes
 
 /*---------------------------------------------------------------------------*\
-                           Class surfGroupIOList Declaration
+                      Class surfRegionIOList Declaration
 \*---------------------------------------------------------------------------*/
 
-class surfGroupIOList
+class surfRegionIOList
 :
-    public surfGroupList,
+    public surfRegionList,
     public regIOobject
 {
     // Private data
@@ -63,29 +63,29 @@ class surfGroupIOList
     // Private Member Functions
 
         //- Disallow default bitwise copy construct
-        surfGroupIOList(const surfGroupIOList&);
+        surfRegionIOList(const surfRegionIOList&);
 
         //- Disallow default bitwise assignment
-        void operator=(const surfGroupIOList&);
+        void operator=(const surfRegionIOList&);
 
 
 public:
 
     //- Runtime type information
-    TypeName("surfGroupIOList");
+    TypeName("surfRegionIOList");
 
 
     // Constructors
 
         //- Construct from IOobject
-        explicit surfGroupIOList(const IOobject& io);
+        explicit surfRegionIOList(const IOobject&);
 
         //- Construct from IOobject
-        surfGroupIOList(const IOobject& io, const surfGroupList&);
+        surfRegionIOList(const IOobject&, const surfRegionList&);
 
     // Destructor
 
-        ~surfGroupIOList();
+        ~surfRegionIOList();
 
 
     // Member Functions
@@ -102,7 +102,7 @@ public:
 
     // IOstream Operators
 
-        friend Ostream& operator<<(Ostream&, const surfGroupIOList&);
+        friend Ostream& operator<<(Ostream&, const surfRegionIOList&);
 };
 
 
diff --git a/src/surfMesh/surfGroup/surfGroupList.H b/src/surfMesh/surfRegion/surfRegion/surfRegionList.H
similarity index 90%
rename from src/surfMesh/surfGroup/surfGroupList.H
rename to src/surfMesh/surfRegion/surfRegion/surfRegionList.H
index 00c22611b6..a6dd1b0703 100644
--- a/src/surfMesh/surfGroup/surfGroupList.H
+++ b/src/surfMesh/surfRegion/surfRegion/surfRegionList.H
@@ -23,17 +23,18 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Typedef
-    Foam::surfGroupList
+    Foam::surfRegionList
 
 Description
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef surfGroupList_H
-#define surfGroupList_H
+#ifndef surfRegionList_H
+#define surfRegionList_H
 
-#include "surfGroup.H"
+#include "surfRegion.H"
 #include "List.H"
+#include "surfRegionIdentifierList.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -42,7 +43,7 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-typedef List<surfGroup>  surfGroupList;
+typedef List<surfRegion>  surfRegionList;
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.C b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.C
similarity index 78%
rename from src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.C
rename to src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.C
index 9b9b94a0b8..12ea17658f 100644
--- a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.C
+++ b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.C
@@ -24,14 +24,14 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "surfPatchIdentifier.H"
+#include "surfRegionIdentifier.H"
 #include "dictionary.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::surfPatchIdentifier::surfPatchIdentifier()
+Foam::surfRegionIdentifier::surfRegionIdentifier()
 :
     name_(word::null),
     boundaryIndex_(0),
@@ -39,7 +39,7 @@ Foam::surfPatchIdentifier::surfPatchIdentifier()
 {}
 
 
-Foam::surfPatchIdentifier::surfPatchIdentifier
+Foam::surfRegionIdentifier::surfRegionIdentifier
 (
     const word& name,
     const label index,
@@ -52,7 +52,7 @@ Foam::surfPatchIdentifier::surfPatchIdentifier
 {}
 
 
-Foam::surfPatchIdentifier::surfPatchIdentifier
+Foam::surfRegionIdentifier::surfRegionIdentifier
 (
     const word& name,
     const dictionary& dict,
@@ -66,9 +66,9 @@ Foam::surfPatchIdentifier::surfPatchIdentifier
 }
 
 
-Foam::surfPatchIdentifier::surfPatchIdentifier
+Foam::surfRegionIdentifier::surfRegionIdentifier
 (
-    const surfPatchIdentifier& p,
+    const surfRegionIdentifier& p,
     const label index
 )
 :
@@ -79,14 +79,14 @@ Foam::surfPatchIdentifier::surfPatchIdentifier
 
 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
-Foam::surfPatchIdentifier::~surfPatchIdentifier()
+Foam::surfRegionIdentifier::~surfRegionIdentifier()
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 
-void Foam::surfPatchIdentifier::write(Ostream& os) const
+void Foam::surfRegionIdentifier::write(Ostream& os) const
 {
     if (geometricType_.size())
     {
@@ -98,18 +98,18 @@ void Foam::surfPatchIdentifier::write(Ostream& os) const
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
-// bool Foam::surfPatchIdentifier::operator!=
+// bool Foam::surfRegionIdentifier::operator!=
 // (
-//     const surfPatchIdentifier& p
+//     const surfRegionIdentifier& p
 // ) const
 // {
 //     return !(*this == p);
 // }
 //
 //
-// bool Foam::surfPatchIdentifier::operator==
+// bool Foam::surfRegionIdentifier::operator==
 // (
-//     const surfPatchIdentifier& p
+//     const surfRegionIdentifier& p
 // ) const
 // {
 //     return geometricType() == p.geometricType() && name() == p.name();
@@ -118,7 +118,7 @@ void Foam::surfPatchIdentifier::write(Ostream& os) const
 
 // * * * * * * * * * * * * * * * Friend Operators  * * * * * * * * * * * * * //
 
-// Foam::Istream& Foam::operator>>(Istream& is, surfPatchIdentifier& p)
+// Foam::Istream& Foam::operator>>(Istream& is, surfRegionIdentifier& p)
 // {
 //     is >> p.name_ >> p.geometricType_;
 //
@@ -126,12 +126,12 @@ void Foam::surfPatchIdentifier::write(Ostream& os) const
 // }
 
 
-Foam::Ostream& Foam::operator<<(Ostream& os, const surfPatchIdentifier& p)
+Foam::Ostream& Foam::operator<<(Ostream& os, const surfRegionIdentifier& p)
 {
     p.write(os);
     os.check
     (
-        "Ostream& operator<<(Ostream&, const surfPatchIdentifier&)"
+        "Ostream& operator<<(Ostream&, const surfRegionIdentifier&)"
     );
     return os;
 }
diff --git a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.H b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.H
similarity index 67%
rename from src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.H
rename to src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.H
index 906cc1b0d9..a4f0609665 100644
--- a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifier.H
+++ b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifier.H
@@ -23,19 +23,23 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Class
-    Foam::surfPatchIdentifier
+    Foam::surfRegionIdentifier
 
 Description
-    Like patchIdentifier but for surfaces with "geometricType" rather
-    than "physicalType".
+    An identifier for a region on a meshed surface.
+
+    Similar in concept to a faceZone on the surface, but can also have a
+    "geometricType" rather.  Despite the similarity to a 'patch' for
+    volume meshes (with a "physicalType"), the region does not have any
+    patch information per se.
 
 SourceFiles
-    surfPatchIdentifier.C
+    surfRegionIdentifier.C
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef surfPatchIdentifier_H
-#define surfPatchIdentifier_H
+#ifndef surfRegionIdentifier_H
+#define surfRegionIdentifier_H
 
 #include "word.H"
 #include "label.H"
@@ -50,24 +54,24 @@ class dictionary;
 
 // Forward declaration of friend functions and operators
 
-class surfPatchIdentifier;
-Ostream& operator<<(Ostream&, const surfPatchIdentifier&);
+class surfRegionIdentifier;
+Ostream& operator<<(Ostream&, const surfRegionIdentifier&);
 
 /*---------------------------------------------------------------------------*\
-                    Class surfPatchIdentifier Declaration
+                    Class surfRegionIdentifier Declaration
 \*---------------------------------------------------------------------------*/
 
-class surfPatchIdentifier
+class surfRegionIdentifier
 {
     // Private data
 
-        //- Name of patch
+        //- Name of region
         word name_;
 
-        //- Index of patch in boundary
+        //- Index of region in surface mesh
         label boundaryIndex_;
 
-        //- Type name of patch
+        //- Type name of region
         mutable word geometricType_;
 
 public:
@@ -75,10 +79,10 @@ public:
     // Constructors
 
         //- Construct null
-        surfPatchIdentifier();
+        surfRegionIdentifier();
 
         //- Construct from components
-        surfPatchIdentifier
+        surfRegionIdentifier
         (
             const word& name,
             const label index,
@@ -87,24 +91,24 @@ public:
         );
 
         //- Construct from dictionary
-        surfPatchIdentifier
+        surfRegionIdentifier
         (
             const word& name,
             const dictionary&,
             const label index
         );
 
-        //- Construct from another patch, resetting the index
-        surfPatchIdentifier
+        //- Construct from another region identifier, resetting the index
+        surfRegionIdentifier
         (
-            const surfPatchIdentifier&,
+            const surfRegionIdentifier&,
             const label index
         );
 
 
     // Destructor
 
-        virtual ~surfPatchIdentifier();
+        virtual ~surfRegionIdentifier();
 
 
     // Member Functions
@@ -121,42 +125,42 @@ public:
             return name_;
         }
 
-        //- Return the geometric type of the patch
+        //- Return the geometric type of the region
         const word& geometricType() const
         {
             return geometricType_;
         }
 
-        //- Return the geometric type of the patch for modification
+        //- Return the geometric type of the region for modification
         word& geometricType()
         {
             return geometricType_;
         }
 
-        //- Return the index of this patch in the boundaryMesh
+        //- Return the index of this region in the surface mesh
         label index() const
         {
             return boundaryIndex_;
         }
 
-        //- Write surfPatchIdentifier as a dictionary
+        //- Write surfRegionIdentifier as a dictionary
         void write(Ostream&) const;
 
-        //- Write surfPatchIdentifier as a dictionary
+        //- Write surfRegionIdentifier as a dictionary
 //        void writeDict(Ostream&) const;
 
 
     // Member Operators
 
-//        bool operator!=(const surfPatchIdentifier&) const;
+//        bool operator!=(const surfRegionIdentifier&) const;
 //
 //        //- compare.
-//        bool operator==(const surfPatchIdentifier&) const;
+//        bool operator==(const surfRegionIdentifier&) const;
 
     // Ostream Operator
 
-        friend Ostream& operator<<(Ostream&, const surfPatchIdentifier&);
-//        friend Istream& operator>>(Istream&, surfPatchIdentifier&);
+        friend Ostream& operator<<(Ostream&, const surfRegionIdentifier&);
+//        friend Istream& operator>>(Istream&, surfRegionIdentifier&);
 };
 
 
diff --git a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifierList.H b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifierList.H
similarity index 89%
rename from src/surfMesh/surfPatchIdentifier/surfPatchIdentifierList.H
rename to src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifierList.H
index fe46d76727..2a8efb0086 100644
--- a/src/surfMesh/surfPatchIdentifier/surfPatchIdentifierList.H
+++ b/src/surfMesh/surfRegion/surfRegionIdentifier/surfRegionIdentifierList.H
@@ -23,16 +23,16 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Typedef
-    Foam::surfPatchIdentifierList
+    Foam::surfRegionIdentifierList
 
 Description
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef surfPatchIdentifierList_H
-#define surfPatchIdentifierList_H
+#ifndef surfRegionIdentifierList_H
+#define surfRegionIdentifierList_H
 
-#include "surfPatchIdentifier.H"
+#include "surfRegionIdentifier.H"
 #include "List.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -42,7 +42,7 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-typedef List<surfPatchIdentifier>  surfPatchIdentifierList;
+typedef List<surfRegionIdentifier>  surfRegionIdentifierList;
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.C b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.C
index fdc916ed97..1cc11e6c7a 100644
--- a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.C
@@ -99,42 +99,42 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
             << exit(FatalError);
     }
 
-    // # of kids is the # of patches
+    // # of kids is the # of regions
     args = cueToOrDie(is, "kids");
-    label nPatches = parse<int>(args);
+    label nRegions = parse<int>(args);
 
-    // Start of vertices for object/patch
-    label patchVertOffset = 0;
+    // Start of vertices for object/region
+    label vertexOffset = 0;
 
     DynamicList<point> dynPoints;
     DynamicList<Face>  dynFaces;
-    List<word>         names(nPatches);
-    List<label>        sizes(nPatches, 0);
+    List<word>         names(nRegions);
+    List<label>        sizes(nRegions, 0);
 
-    for (label patchI = 0; patchI < nPatches; ++patchI)
+    for (label regionI = 0; regionI < nRegions; ++regionI)
     {
-        names[patchI] = word("patch") + Foam::name(patchI);
+        names[regionI] = word("region") + Foam::name(regionI);
 
-        args = cueToOrDie(is, "OBJECT", "while reading " + names[patchI]);
+        args = cueToOrDie(is, "OBJECT", "while reading " + names[regionI]);
 
-        // number of vertices for this patch
-        label  nPatchPoints = 0;
+        // number of vertices for this region
+        label  nRegionPoints = 0;
         vector location(pTraits<vector>::zero);
         // tensor rotation(I);
 
-        // Read all info for current patch
+        // Read all info for current region
         while (is.good())
         {
             // Read line and get first word. If end of file break since
-            // patch should always end with 'kids' command ?not sure.
+            // region should always end with 'kids' command ?not sure.
             if (!readCmd(is, cmd, args))
             {
                 FatalErrorIn
                 (
                     "fileFormats::AC3DsurfaceFormat::read(const fileName&)"
                 )
-                    << "Did not read up to \"kids 0\" while reading patch "
-                    << patchI << " from file " << filename
+                    << "Did not read up to \"kids 0\" while reading region "
+                    << regionI << " from file " << filename
                     << exit(FatalError);
             }
 
@@ -144,7 +144,7 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                 string str = parse<string>(args);
                 string::stripInvalid<word>(str);
 
-                names[patchI] = str;
+                names[regionI] = str;
             }
             else if (cmd == "rot")
             {
@@ -164,7 +164,7 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                 )
                     << "rot (rotation tensor) command not implemented"
                     << "Line:" << cmd << ' ' << args << endl
-                    << "while reading patch " << patchI << endl;
+                    << "while reading region " << regionI << endl;
             }
             else if (cmd == "loc")
             {
@@ -179,9 +179,9 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
             else if (cmd == "numvert")
             {
                 // numvert  %d
-                nPatchPoints = parse<int>(args);
+                nRegionPoints = parse<int>(args);
 
-                for (label vertI = 0; vertI < nPatchPoints; ++vertI)
+                for (label vertI = 0; vertI < nRegionPoints; ++vertI)
                 {
                     is.getLine(line);
                     IStringStream lineStream(line);
@@ -202,8 +202,8 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                 {
                     static string errorMsg =
                         string(" while reading face ")
-                            + Foam::name(faceI) + " on patch "
-                            + Foam::name(patchI)
+                            + Foam::name(faceI) + " on region "
+                            + Foam::name(regionI)
                             + " from file " + filename;
 
                     cueToOrDie(is, "SURF", errorMsg);
@@ -216,7 +216,7 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                     forAll(verts, vertI)
                     {
                         is.getLine(line);
-                        verts[vertI] = parse<int>(line) + patchVertOffset;
+                        verts[vertI] = parse<int>(line) + vertexOffset;
                     }
 
                     UList<label>& f = static_cast<UList<label>&>(verts);
@@ -230,23 +230,23 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                             label fp2 = (fp1 + 1) % f.size();
 
                             dynFaces.append(triFace(f[0], f[fp1], f[fp2]));
-                            sizes[patchI]++;
+                            sizes[regionI]++;
                         }
                     }
                     else
                     {
                         dynFaces.append(Face(f));
-                        sizes[patchI]++;
+                        sizes[regionI]++;
                     }
                 }
 
-                // Done the current patch.
+                // Done the current region.
                 // Increment the offset vertices are stored at
-                patchVertOffset += nPatchPoints;
+                vertexOffset += nRegionPoints;
             }
             else if (cmd == "kids")
             {
-                // 'kids' denotes the end of the current patch.
+                // 'kids' denotes the end of the current region.
                 label nKids = parse<int>(args);
 
                 if (nKids != 0)
@@ -257,11 +257,11 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
                     )
                         << "Can only read objects without kids."
                         << " Encountered " << nKids << " kids when"
-                        << " reading patch " << patchI
+                        << " reading region " << regionI
                         << exit(FatalError);
                 }
 
-                // Done reading current patch
+                // Done reading current region
                 break;
             }
         }
@@ -271,8 +271,8 @@ bool Foam::fileFormats::AC3DsurfaceFormat<Face>::read
     this->storedPoints().transfer(dynPoints);
     this->storedFaces().transfer(dynFaces);
 
-    // add patches, culling empty groups
-    this->addPatches(sizes, names, true);
+    // add regions, culling empty ones
+    this->addRegions(sizes, names, true);
     this->stitchFaces(SMALL);
     return true;
 }
@@ -287,16 +287,16 @@ void Foam::fileFormats::AC3DsurfaceFormat<Face>::write
 {
     const pointField& pointLst = surf.points();
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
-    writeHeader(os, patchLst);
+    writeHeader(os, regionLst);
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& p = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
         os  << "OBJECT poly" << nl
-            << "name \"" << p.name() << '"' << endl;
+            << "name \"" << reg.name() << '"' << endl;
 
         // Temporary PrimitivePatch to calculate compact points & faces
         // use 'UList' to avoid allocations!
@@ -317,12 +317,12 @@ void Foam::fileFormats::AC3DsurfaceFormat<Face>::write
 
         os << "numsurf " << patch.localFaces().size() << endl;
 
-        forAll(patch.localFaces(), faceI)
+        forAll(patch.localFaces(), localFaceI)
         {
-            const Face& f = patch.localFaces()[faceI];
+            const Face& f = patch.localFaces()[localFaceI];
 
             os  << "SURF 0x20" << nl          // polygon
-                << "mat " << patchI << nl
+                << "mat " << regionI << nl
                 << "refs " << f.size() << nl;
 
             forAll(f, fp)
@@ -344,25 +344,25 @@ void Foam::fileFormats::AC3DsurfaceFormat<Face>::write
 )
 {
     labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+    List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
-    writeHeader(os, patchLst);
+    writeHeader(os, regionLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& p = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
         os  << "OBJECT poly" << nl
-            << "name \"" << p.name() << '"' << endl;
+            << "name \"" << reg.name() << '"' << endl;
 
-        // Create patch with only patch faces included for ease of addressing
-        boolList include(surf.size(), false);
+        // Create region with only region faces included for ease of addressing
+        labelHashSet include(surf.size());
 
-        forAll(p, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const label faceI = faceMap[faceIndex++];
-            include[faceI] = true;
+            include.insert(faceI);
         }
 
         UnsortedMeshedSurface<Face> subm = surf.subsetMesh(include);
@@ -379,12 +379,12 @@ void Foam::fileFormats::AC3DsurfaceFormat<Face>::write
 
         os << "numsurf " << subm.localFaces().size() << endl;
 
-        forAll(subm.localFaces(), faceI)
+        forAll(subm.localFaces(), localFaceI)
         {
-            const Face& f = subm.localFaces()[faceI];
+            const Face& f = subm.localFaces()[localFaceI];
 
             os  << "SURF 0x20" << nl          // polygon
-                << "mat " << patchI << nl
+                << "mat " << regionI << nl
                 << "refs " << f.size() << nl;
 
             forAll(f, fp)
diff --git a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.H b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.H
index 120235eedf..3ccfeeda23 100644
--- a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormat.H
@@ -31,7 +31,7 @@ Description
     http://www.inivis.com/ac3d/man/ac3dfileformat.html
 
 Note
-   The faces are already organized as patches.
+   The faces are already organized as regions.
    The output is always sorted by regions.
 
 SourceFiles
diff --git a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.C
index e47ec990d6..e31c59f796 100644
--- a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.C
@@ -116,12 +116,12 @@ Foam::string Foam::fileFormats::AC3DsurfaceFormatCore::cueToOrDie
 void Foam::fileFormats::AC3DsurfaceFormatCore::writeHeader
 (
     Ostream& os,
-    const List<surfGroup>& patchLst
+    const UList<surfRegion>& regionLst
 )
 {
-    // Write with patches as separate objects under "world" object.
+    // Write with regions as separate objects under "world" object.
     // Header is taken over from sample file.
-    // Defines separate materials for all patches. Recycle colours.
+    // Defines separate materials for all regions. Recycle colours.
 
     // Define 8 standard colours as r,g,b components
     static scalar colourMap[] =
@@ -139,14 +139,12 @@ void Foam::fileFormats::AC3DsurfaceFormatCore::writeHeader
     // Write header. Define materials.
     os  << "AC3Db" << nl;
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const word& pName = patchLst[patchI].name();
-
-        label colourI = patchI % 8;
+        label colourI = regionI % 8;
         label colourCompI = 3 * colourI;
 
-        os  << "MATERIAL \"" << pName << "Mat\" rgb "
+        os  << "MATERIAL \"" << regionLst[regionI].name() << "Mat\" rgb "
             << colourMap[colourCompI] << ' ' << colourMap[colourCompI+1]
             << ' ' << colourMap[colourCompI+2]
             << "  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5  shi 10"
@@ -155,7 +153,7 @@ void Foam::fileFormats::AC3DsurfaceFormatCore::writeHeader
     }
 
     os  << "OBJECT world" << nl
-        << "kids " << patchLst.size() << endl;
+        << "kids " << regionLst.size() << endl;
 }
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
diff --git a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.H
index d8ecc3c0ee..574f7da1f5 100644
--- a/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/ac3d/AC3DsurfaceFormatCore.H
@@ -49,7 +49,7 @@ namespace fileFormats
 {
 
 /*---------------------------------------------------------------------------*\
-                      Class AC3DfileFormat Declaration
+                       Class AC3DfileFormat Declaration
 \*---------------------------------------------------------------------------*/
 
 class AC3DsurfaceFormatCore
@@ -77,7 +77,7 @@ protected:
     );
 
     //- Write header with materials
-    static void writeHeader(Ostream&, const List<surfGroup>&);
+    static void writeHeader(Ostream&, const UList<surfRegion>&);
 
 };
 
diff --git a/src/surfMesh/surfaceFormats/ftr/FTRsurfaceFormat.C b/src/surfMesh/surfaceFormats/ftr/FTRsurfaceFormat.C
index aaa00d9a18..3840bfaea7 100644
--- a/src/surfMesh/surfaceFormats/ftr/FTRsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/ftr/FTRsurfaceFormat.C
@@ -63,40 +63,40 @@ bool Foam::fileFormats::FTRsurfaceFormat<Face>::read
             << exit(FatalError);
     }
 
-    List<ftrPatch> readPatches(is);
+    List<ftrPatch> ftrPatches(is);
 
     // read points directly
     is >> this->storedPoints();
 
-    // read faces with keys
-    List<Keyed<triFace> > readFaces(is);
+    // faces read with keys
+    List<Keyed<triFace> > facesRead(is);
 
-    List<Face>  faceLst(readFaces.size());
-    List<label> regionLst(readFaces.size());
+    List<Face>  faceLst(facesRead.size());
+    List<label> regionIds(facesRead.size());
 
     // disentangle faces/keys - already triangulated
-    forAll(readFaces, faceI)
+    forAll(facesRead, faceI)
     {
         // unfortunately cannot transfer to save memory
-        faceLst[faceI]   = readFaces[faceI];
-        regionLst[faceI] = readFaces[faceI].key();
+        faceLst[faceI]   = facesRead[faceI];
+        regionIds[faceI] = facesRead[faceI].key();
     }
 
     this->storedFaces().transfer(faceLst);
-    this->storedRegions().transfer(regionLst);
+    this->storedRegionIds().transfer(regionIds);
 
-    // cast ftrPatch into new form
-    List<surfPatchIdentifier> newPatches(readPatches.size());
-    forAll(newPatches, patchI)
+    // change ftrPatch into surfRegionIdentifier
+    List<surfRegionIdentifier> newRegions(ftrPatches.size());
+    forAll(newRegions, regionI)
     {
-        newPatches[patchI] = surfPatchIdentifier
+        newRegions[regionI] = surfRegionIdentifier
         (
-            readPatches[patchI].name(),
-            patchI
+            ftrPatches[regionI].name(),
+            regionI
         );
     }
 
-    this->storedPatches().transfer(newPatches);
+    this->storedRegionToc().transfer(newRegions);
     return true;
 }
 
diff --git a/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.C b/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.C
index bac8cda4e3..ab3cf269f2 100644
--- a/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.C
@@ -80,13 +80,13 @@ bool Foam::fileFormats::GTSsurfaceFormat<Face>::read
 
 
     // write directly into the lists:
-    pointField& pointLst = this->storedPoints();
-    List<Face>& faceLst  = this->storedFaces();
-    List<label>& regionLst = this->storedRegions();
+    pointField&  pointLst  = this->storedPoints();
+    List<Face>&  faceLst   = this->storedFaces();
+    List<label>& regionIds = this->storedRegionIds();
 
     pointLst.setSize(nPoints);
     faceLst.setSize(nElems);
-    regionLst.setSize(nElems);
+    regionIds.setSize(nElems);
 
     // Read points
     forAll(pointLst, pointI)
@@ -118,7 +118,7 @@ bool Foam::fileFormats::GTSsurfaceFormat<Face>::read
 
 
     // Read triangles. Convert references to edges into pointlabels
-    label maxPatch = 0;
+    label maxRegion = 0;
     forAll(faceLst, faceI)
     {
         label e0Label, e1Label, e2Label;
@@ -138,9 +138,9 @@ bool Foam::fileFormats::GTSsurfaceFormat<Face>::read
                 if (!lineStream.bad())
                 {
                     regionI = num;
-                    if (maxPatch < regionI)
+                    if (maxRegion < regionI)
                     {
-                        maxPatch = regionI;
+                        maxRegion = regionI;
                     }
                 }
             }
@@ -202,21 +202,21 @@ bool Foam::fileFormats::GTSsurfaceFormat<Face>::read
         }
 
         faceLst[faceI] = triFace(e0Far, common01, e1Far);
-        regionLst[faceI] = regionI;
+        regionIds[faceI] = regionI;
     }
 
 
-    List<surfPatchIdentifier> newPatches(maxPatch+1);
-    forAll(newPatches, patchI)
+    List<surfRegionIdentifier> newRegions(maxRegion+1);
+    forAll(newRegions, regionI)
     {
-        newPatches[patchI] = surfPatchIdentifier
+        newRegions[regionI] = surfRegionIdentifier
         (
-            "patch" + ::Foam::name(patchI),
-            patchI
+            "region" + ::Foam::name(regionI),
+            regionI
         );
     }
 
-    this->storedPatches().transfer(newPatches);
+    this->storedRegionToc().transfer(newRegions);
     return true;
 }
 
@@ -230,13 +230,12 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
 {
     const pointField& pointLst = surf.points();
     const List<Face>& faceLst  = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
 
     // check if output triangulation would be required
     // It is too annoying to triangulate on-the-fly
     // just issue a warning and get out
-    //
     if (!surf.isTri())
     {
         label nNonTris = 0;
@@ -261,14 +260,14 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
         }
     }
 
-    // Write header, print patch names as comment
+    // Write header, print region names as comment
     os  << "# GTS file" << nl
         << "# Regions:" << nl;
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        os  << "#     " << patchI << "    "
-            << patchLst[patchI].name() << nl;
+        os  << "#     " << regionI << "    "
+            << regionLst[regionI].name() << nl;
     }
     os  << "#" << endl;
 
@@ -301,18 +300,18 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
     const labelListList& faceEs = surf.faceEdges();
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const labelList& fEdges = faceEs[faceIndex++];
 
             os  << fEdges[0] + 1 << ' '
                 << fEdges[1] + 1 << ' '
                 << fEdges[2] + 1 << ' '
-                << patchI << endl;
+                << regionI << endl;
         }
     }
 }
@@ -327,8 +326,8 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
 {
     const pointField& pointLst   = surf.points();
     const List<Face>& faceLst    = surf.faces();
-    const List<label>& regionLst = surf.regions();
-    const List<surfPatchIdentifier>& patchInfo = surf.patches();
+    const List<label>& regionIds = surf.regionIds();
+    const List<surfRegionIdentifier>& regionToc = surf.regionToc();
 
     // check if output triangulation would be required
     // It is too annoying to triangulate on-the-fly
@@ -357,18 +356,14 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
         }
     }
 
-    labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
-
-
-    // Write header, print patch names as comment
+    // Write header, print region names as comment
     os  << "# GTS file" << nl
         << "# Regions:" << nl;
 
-    forAll(patchInfo, patchI)
+    forAll(regionToc, regionI)
     {
-        os  << "#     " << patchI << "    "
-            << patchInfo[patchI].name() << nl;
+        os  << "#     " << regionI << "    "
+            << regionToc[regionI].name() << nl;
     }
     os  << "#" << endl;
 
@@ -409,7 +404,7 @@ void Foam::fileFormats::GTSsurfaceFormat<Face>::write
         os  << fEdges[0] + 1 << ' '
             << fEdges[1] + 1 << ' '
             << fEdges[2] + 1 << ' '
-            << regionLst[faceI] << endl;
+            << regionIds[faceI] << endl;
     }
 }
 
diff --git a/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.H b/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.H
index 081a92c8f6..62d218274d 100644
--- a/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/gts/GTSsurfaceFormat.H
@@ -27,7 +27,7 @@ Class
 
 Description
     Provide a means of reading/writing GTS format.
-    The output is never sorted by patch.
+    The output is never sorted by region.
 
 SourceFiles
     GTSsurfaceFormat.C
diff --git a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.C b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.C
index 7f4cad25dc..6a4da1ec80 100644
--- a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.C
@@ -85,7 +85,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
     // Ansa tags. Denoted by $ANSA_NAME.
     // These will appear just before the first use of a type.
     // We read them and store the PSHELL types which are used to name
-    // the patches.
+    // the regions.
     label ansaId = -1;
     word  ansaType, ansaName;
 
@@ -211,7 +211,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
             fTri[1] = readLabel(IStringStream(line.substr(32,8))());
             fTri[2] = readLabel(IStringStream(line.substr(40,8))());
 
-            // Convert groupID into patchID
+            // Convert groupID into regionId
             Map<label>::const_iterator fnd = lookup.find(groupId);
             if (fnd != lookup.end())
             {
@@ -227,7 +227,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
                 regionI = dynSizes.size();
                 lookup.insert(groupId, regionI);
                 dynSizes.append(0);
-                // Info<< "patch" << regionI << " => group " << groupId <<endl;
+                // Info<< "region" << regionI << " => group " << groupId <<endl;
             }
 
             dynFaces.append(fTri);
@@ -245,7 +245,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
             fQuad[2] = readLabel(IStringStream(line.substr(40,8))());
             fQuad[3] = readLabel(IStringStream(line.substr(48,8))());
 
-            // Convert groupID into patchID
+            // Convert groupID into regionId
             Map<label>::const_iterator fnd = lookup.find(groupId);
             if (fnd != lookup.end())
             {
@@ -261,7 +261,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
                 regionI = dynSizes.size();
                 lookup.insert(groupId, regionI);
                 dynSizes.append(0);
-                // Info<< "patch" << regionI << " => group " << groupId <<endl;
+                // Info<< "region" << regionI << " => group " << groupId <<endl;
             }
 
 
@@ -322,7 +322,7 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
         }
         else if (cmd == "PSHELL")
         {
-            // pshell type for patch names with the Ansa extension
+            // pshell type for region names with the Ansa extension
             label groupId = readLabel(IStringStream(line.substr(8,8))());
 
             if (groupId == ansaId && ansaType == "PSHELL")
@@ -370,29 +370,29 @@ bool Foam::fileFormats::NASsurfaceFormat<Face>::read
     mapPointId.clear();
 
 
-    // create default patch names, or from ANSA/Hypermesh information
+    // create default region names, or from ANSA/Hypermesh information
     List<word> names(dynSizes.size());
     forAllConstIter(Map<label>, lookup, iter)
     {
-        const label patchI = iter();
-        const label groupI = iter.key();
+        const label regionI = iter();
+        const label groupI  = iter.key();
 
         Map<word>::const_iterator fnd = nameLookup.find(groupI);
         if (fnd != nameLookup.end())
         {
-            names[patchI] = fnd();
+            names[regionI] = fnd();
         }
         else
         {
-            names[patchI] = word("patch") + ::Foam::name(patchI);
+            names[regionI] = word("region") + ::Foam::name(regionI);
         }
     }
 
 
     sortFacesAndStore(dynFaces.xfer(), dynRegions.xfer(), sorted);
 
-    // add patches, culling empty groups
-    this->addPatches(dynSizes, names, true);
+    // add regions, culling empty ones
+    this->addRegions(dynSizes, names, true);
 
     return true;
 }
diff --git a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.H b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.H
index 19cd25f5f5..c4b9c0b2ed 100644
--- a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormat.H
@@ -29,7 +29,7 @@ Description
     Nastran surface reader.
 
     - Uses the Ansa "$ANSA_NAME" or the Hypermesh "$HMNAME COMP" extensions
-      to obtain patch names.
+      to obtain region names.
     - Handles Nastran short and long formats, but not free format.
     - Properly handles the Nastran compact floating point notation: \n
     @verbatim
diff --git a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormatCore.C
index 2700b16deb..568f902e31 100644
--- a/src/surfMesh/surfaceFormats/nas/NASsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/nas/NASsurfaceFormatCore.C
@@ -49,7 +49,7 @@ Foam::scalar Foam::fileFormats::NASsurfaceFormatCore::parseNASCoord
         {
             exponent = -exponent;
         }
-        return mantissa*pow(10, exponent);
+        return mantissa * pow(10, exponent);
     }
     else
     {
diff --git a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.C b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.C
index 93bee6e737..bdebe7e0d5 100644
--- a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.C
@@ -75,10 +75,10 @@ bool Foam::fileFormats::OBJsurfaceFormat<Face>::read
     DynamicList<label> dynSizes;
     HashTable<label>   lookup;
 
-    // place faces without a group in patch0
+    // place faces without a group in region0
     label regionI = 0;
-    lookup.insert("patch0", regionI);
-    dynNames.append("patch0");
+    lookup.insert("region0", regionI);
+    dynNames.append("region0");
     dynSizes.append(0);
 
     while (is.good())
@@ -204,8 +204,8 @@ bool Foam::fileFormats::OBJsurfaceFormat<Face>::read
 
     sortFacesAndStore(dynFaces.xfer(), dynRegions.xfer(), sorted);
 
-    // add patches, culling empty groups
-    this->addPatches(dynSizes, dynNames, true);
+    // add regions, culling empty ones
+    this->addRegions(dynSizes, dynNames, true);
     return true;
 }
 
@@ -218,18 +218,18 @@ void Foam::fileFormats::OBJsurfaceFormat<Face>::write
 )
 {
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
-    writeHeader(os, surf.points(), faceLst.size(), patchLst);
+    writeHeader(os, surf.points(), faceLst.size(), regionLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        os << "g " << patch.name() << endl;
+        os << "g " << reg.name() << endl;
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
 
@@ -255,19 +255,19 @@ void Foam::fileFormats::OBJsurfaceFormat<Face>::write
     const List<Face>& faceLst = surf.faces();
 
     labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+    List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
-    writeHeader(os, surf.points(), faceLst.size(), patchLst);
+    writeHeader(os, surf.points(), faceLst.size(), regionLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
         // Print all faces belonging to this region
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        os << "g " << patch.name() << endl;
+        os << "g " << reg.name() << endl;
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const Face& f = faceLst[faceMap[faceIndex++]];
 
diff --git a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.H b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.H
index 12afceff7d..87d573c1c5 100644
--- a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormat.H
@@ -63,14 +63,6 @@ class OBJsurfaceFormat
 {
     // Private Member Functions
 
-        static void writeHead
-        (
-            Ostream&,
-            const pointField&,
-            const List<Face>&,
-            const List<surfGroup>&
-        );
-
         //- Disallow default bitwise copy construct
         OBJsurfaceFormat(const OBJsurfaceFormat<Face>&);
 
diff --git a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.C
index f35c539808..24c538de3e 100644
--- a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.C
@@ -36,7 +36,7 @@ void Foam::fileFormats::OBJsurfaceFormatCore::writeHeader
     Ostream& os,
     const pointField& pointLst,
     const label nFaces,
-    const List<surfGroup>& patchLst
+    const UList<surfRegion>& regionLst
 )
 {
     os  << "# Wavefront OBJ file written " << clock::dateTime().c_str() << nl
@@ -44,13 +44,13 @@ void Foam::fileFormats::OBJsurfaceFormatCore::writeHeader
         << nl
         << "# points : " << pointLst.size() << nl
         << "# faces  : " << nFaces << nl
-        << "# patches: " << patchLst.size() << nl;
+        << "# region : " << regionLst.size() << nl;
 
-    // Print patch names as comment
-    forAll(patchLst, patchI)
+    // Print region names as comment
+    forAll(regionLst, regionI)
     {
-        os  << "#   " << patchI << "  " << patchLst[patchI].name()
-            << "  (nFaces: " << patchLst[patchI].size() << ")" << nl;
+        os  << "#   " << regionI << "  " << regionLst[regionI].name()
+            << "  (nFaces: " << regionLst[regionI].size() << ")" << nl;
     }
 
     os  << nl
diff --git a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.H
index 539b1b6903..00869aaaf3 100644
--- a/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/obj/OBJsurfaceFormatCore.H
@@ -63,7 +63,7 @@ protected:
         Ostream&,
         const pointField&,
         const label nFaces,
-        const List<surfGroup>&
+        const UList<surfRegion>&
     );
 
 };
diff --git a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.C b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.C
index c679edc963..0d1f6ee5aa 100644
--- a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.C
@@ -146,7 +146,7 @@ bool Foam::fileFormats::OFFsurfaceFormat<Face>::read
     reset(pointLst.xfer(), dynFaces.xfer());
 
     // no region information
-    this->onePatch();
+    this->oneRegion();
     return true;
 }
 
@@ -161,16 +161,16 @@ void Foam::fileFormats::OFFsurfaceFormat<Face>::write
     const List<Face>& faceLst = surf.faces();
 
     labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+    List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
-    writeHeader(os, surf.points(), faceLst.size(), patchLst);
+    writeHeader(os, surf.points(), faceLst.size(), regionLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        os << "# <patch name=\"" << patchLst[patchI].name() << "\">" << endl;
+        os << "# <region name=\"" << regionLst[regionI].name() << "\">" << endl;
 
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceMap[faceIndex++]];
 
@@ -181,9 +181,9 @@ void Foam::fileFormats::OFFsurfaceFormat<Face>::write
             }
 
             // add optional region information
-            os << ' ' << patchI << endl;
+            os << ' ' << regionI << endl;
         }
-        os << "# </patch>" << endl;
+        os << "# </region>" << endl;
     }
     os << "# </faces>" << endl;
 }
@@ -197,16 +197,16 @@ void Foam::fileFormats::OFFsurfaceFormat<Face>::write
 )
 {
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
-    writeHeader(os, surf.points(), faceLst.size(), patchLst);
+    writeHeader(os, surf.points(), faceLst.size(), regionLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        os << "# <patch name=\"" << patchLst[patchI].name() << "\">" << endl;
+        os << "# <region name=\"" << regionLst[regionI].name() << "\">" << endl;
 
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
 
@@ -217,9 +217,9 @@ void Foam::fileFormats::OFFsurfaceFormat<Face>::write
             }
 
             // add optional region information
-            os << ' ' << patchI << endl;
+            os << ' ' << regionI << endl;
         }
-        os << "# </patch>" << endl;
+        os << "# </region>" << endl;
     }
     os << "# </faces>" << endl;
 }
diff --git a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.H b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.H
index 28eda006ef..89e82aee62 100644
--- a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormat.H
@@ -71,14 +71,6 @@ class OFFsurfaceFormat
 {
     // Private Member Functions
 
-        static void writeHead
-        (
-            Ostream&,
-            const pointField&,
-            const List<Face>&,
-            const List<surfGroup>&
-        );
-
         //- Disallow default bitwise copy construct
         OFFsurfaceFormat(const OFFsurfaceFormat&);
 
diff --git a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.C
index 5e40979936..b3866bdbc7 100644
--- a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.C
@@ -34,7 +34,7 @@ void Foam::fileFormats::OFFsurfaceFormatCore::writeHeader
     Ostream& os,
     const pointField& pointLst,
     const label nFaces,
-    const List<surfGroup>& patchLst
+    const UList<surfRegion>& regionLst
 )
 {
     // Write header
@@ -43,13 +43,13 @@ void Foam::fileFormats::OFFsurfaceFormatCore::writeHeader
         << nl
         << "# points : " << pointLst.size() << nl
         << "# faces  : " << nFaces << nl
-        << "# patches: " << patchLst.size() << nl;
+        << "# regions: " << regionLst.size() << nl;
 
-    // Print patch names as comment
-    forAll(patchLst, patchI)
+    // Print region names as comment
+    forAll(regionLst, regionI)
     {
-        os  << "#   " << patchI << "  " << patchLst[patchI].name()
-            << "  (nFaces: " << patchLst[patchI].size() << ")" << nl;
+        os  << "#   " << regionI << "  " << regionLst[regionI].name()
+            << "  (nFaces: " << regionLst[regionI].size() << ")" << nl;
     }
 
     os  << nl
diff --git a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.H
index 6a847ecc04..8706d1fb94 100644
--- a/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/off/OFFsurfaceFormatCore.H
@@ -63,7 +63,7 @@ protected:
         Ostream&,
         const pointField&,
         const label nFaces,
-        const List<surfGroup>&
+        const UList<surfRegion>&
     );
 
 };
diff --git a/src/surfMesh/surfaceFormats/smesh/SMESHsurfaceFormat.C b/src/surfMesh/surfaceFormats/smesh/SMESHsurfaceFormat.C
index 2e6cd1d678..f256d308fc 100644
--- a/src/surfMesh/surfaceFormats/smesh/SMESHsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/smesh/SMESHsurfaceFormat.C
@@ -46,14 +46,14 @@ void Foam::fileFormats::SMESHsurfaceFormat<Face>::write
 )
 {
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
     writeHeader(os, surf.points(), faceLst.size());
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
 
@@ -62,7 +62,7 @@ void Foam::fileFormats::SMESHsurfaceFormat<Face>::write
             {
                 os << ' ' << f[fp];
             }
-            os << ' ' << patchI << endl;
+            os << ' ' << regionI << endl;
         }
     }
 
@@ -82,12 +82,12 @@ void Foam::fileFormats::SMESHsurfaceFormat<Face>::write
     writeHeader(os, surf.points(), faceLst.size());
 
     labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+    List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceMap[faceIndex++]];
 
@@ -96,7 +96,7 @@ void Foam::fileFormats::SMESHsurfaceFormat<Face>::write
             {
                 os << ' ' << f[fp];
             }
-            os << ' ' << patchI << endl;
+            os << ' ' << regionI << endl;
         }
     }
 
diff --git a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormat.C b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormat.C
index f6aa76f307..05b82cd1f4 100644
--- a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormat.C
@@ -40,8 +40,7 @@ inline void Foam::fileFormats::STARCDsurfaceFormat<Face>::writeShell
     const label cellTableId
 )
 {
-    os
-        << cellId                    // includes 1 offset
+    os  << cellId                    // includes 1 offset
         << " " << starcdShellShape_  // 3(shell) shape
         << " " << f.size()
         << " " << cellTableId
@@ -54,9 +53,7 @@ inline void Foam::fileFormats::STARCDsurfaceFormat<Face>::writeShell
     {
         if ((count % 8) == 0)
         {
-            os
-                << nl
-                << "  " << cellId;
+            os  << nl << "  " << cellId;
         }
         os  << " " << f[fp] + 1;
         count++;
@@ -160,7 +157,7 @@ bool Foam::fileFormats::STARCDsurfaceFormat<Face>::read
 
         if (typeId == starcdShellType_)
         {
-            // Convert groupID into patchID
+            // Convert groupID into regionID
             Map<label>::const_iterator fnd = lookup.find(cellTableId);
             if (fnd != lookup.end())
             {
@@ -214,8 +211,8 @@ bool Foam::fileFormats::STARCDsurfaceFormat<Face>::read
 
     sortFacesAndStore(dynFaces.xfer(), dynRegions.xfer(), sorted);
 
-    // add patches, culling empty groups
-    this->addPatches(dynSizes, dynNames, true);
+    // add regions, culling empty ones
+    this->addRegions(dynSizes, dynNames, true);
     return true;
 }
 
@@ -234,17 +231,17 @@ void Foam::fileFormats::STARCDsurfaceFormat<Face>::write
     writeHeader(os, "CELL");
 
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
-            writeShell(os, f, faceIndex, patchI + 1);
+            writeShell(os, f, faceIndex, regionI + 1);
         }
     }
 
@@ -254,7 +251,7 @@ void Foam::fileFormats::STARCDsurfaceFormat<Face>::write
         OFstream(baseName + ".inp")(),
         surf.points(),
         surf.size(),
-        patchLst
+        regionLst
     );
 }
 
@@ -275,17 +272,17 @@ void Foam::fileFormats::STARCDsurfaceFormat<Face>::write
 
     const List<Face>& faceLst = surf.faces();
     labelList faceMap;
-    List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+    List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        forAll(patch, patchFaceI)
+        forAll(reg, localFaceI)
         {
             const Face& f = faceLst[faceMap[faceIndex++]];
-            writeShell(os, f, faceIndex, patchI + 1);
+            writeShell(os, f, faceIndex, regionI + 1);
         }
     }
 
@@ -295,7 +292,7 @@ void Foam::fileFormats::STARCDsurfaceFormat<Face>::write
         OFstream(baseName + ".inp")(),
         surf.points(),
         surf.size(),
-        patchLst
+        regionLst
     );
 }
 
diff --git a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.C
index c8b413f662..b7691491e2 100644
--- a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.C
@@ -166,7 +166,7 @@ void Foam::fileFormats::STARCDsurfaceFormatCore::writeCase
     Ostream& os,
     const pointField& pointLst,
     const label nFaces,
-    const List<surfGroup>& patchLst
+    const UList<surfRegion>& regionLst
 )
 {
     word caseName = os.name().lessExt().name();
@@ -176,10 +176,11 @@ void Foam::fileFormats::STARCDsurfaceFormatCore::writeCase
         << "! case " << caseName << nl
         << "! ------------------------------" << nl;
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        os  << "ctable " << patchI + 1 << " shell" << nl
-            << "ctname " << patchI + 1 << " " << patchLst[patchI].name() << nl;
+        os  << "ctable " << regionI + 1 << " shell" << nl
+            << "ctname " << regionI + 1 << " "
+            << regionLst[regionI].name() << nl;
     }
 
     os  << "! ------------------------------" << nl
diff --git a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.H
index 3ee15cc67b..481cedd1c2 100644
--- a/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/starcd/STARCDsurfaceFormatCore.H
@@ -70,7 +70,7 @@ protected:
         Ostream&,
         const pointField&,
         const label nFaces,
-        const List<surfGroup>&
+        const UList<surfRegion>&
     );
 
 };
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
index d60e49180c..919f6d98e2 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.C
@@ -70,7 +70,7 @@ inline void Foam::fileFormats::STLsurfaceFormat<Face>::writeShell
     const pointField& pointLst,
     const Face& f,
     const vector& norm,
-    const label patchI
+    const label regionI
 )
 {
     // simple triangulation about f[0].
@@ -86,7 +86,7 @@ inline void Foam::fileFormats::STLsurfaceFormat<Face>::writeShell
             p0,
             pointLst[f[fp1]],
             pointLst[f[fp2]],
-            patchI
+            regionI
         );
 
         stlTri.write(os);
@@ -104,22 +104,22 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeASCII
 {
     const pointField& pointLst = surf.points();
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
     const vectorField& normLst = surf.faceNormals();
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
         // Print all faces belonging to this region
-        const surfGroup& patch = patchLst[patchI];
+        const surfRegion& reg = regionLst[regionI];
 
-        os << "solid " << patch.name() << endl;
-        forAll(patch, patchFaceI)
+        os << "solid " << reg.name() << endl;
+        forAll(reg, localFaceI)
         {
             const label faceI = faceIndex++;
             writeShell(os, pointLst, faceLst[faceI], normLst[faceI]);
         }
-        os << "endsolid " << patch.name() << endl;
+        os << "endsolid " << reg.name() << endl;
     }
 }
 
@@ -136,34 +136,34 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeASCII
     const List<Face>& faceLst  = surf.faces();
     const vectorField& normLst = surf.faceNormals();
 
-    if (surf.patches().size() == 1)
+    if (surf.regionToc().size() == 1)
     {
         // a single region - we can skip sorting
-        os << "solid " << surf.patches()[0].name() << endl;
+        os << "solid " << surf.regionToc()[0].name() << endl;
         forAll(faceLst, faceI)
         {
             writeShell(os, pointLst, faceLst[faceI], normLst[faceI]);
         }
-        os << "endsolid " << surf.patches()[0].name() << endl;
+        os << "endsolid " << surf.regionToc()[0].name() << endl;
     }
    else
    {
         labelList faceMap;
-        List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+        List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
         label faceIndex = 0;
-        forAll(patchLst, patchI)
+        forAll(regionLst, regionI)
         {
             // Print all faces belonging to this region
-            const surfGroup& patch = patchLst[patchI];
+            const surfRegion& reg = regionLst[regionI];
 
-            os << "solid " << patch.name() << endl;
-            forAll(patch, patchFaceI)
+            os << "solid " << reg.name() << endl;
+            forAll(reg, localFaceI)
             {
                 const label faceI = faceMap[faceIndex++];
                 writeShell(os, pointLst, faceLst[faceI], normLst[faceI]);
             }
-            os << "endsolid " << patch.name() << endl;
+            os << "endsolid " << reg.name() << endl;
         }
    }
 }
@@ -177,10 +177,10 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeBINARY
     const MeshedSurface<Face>& surf
 )
 {
-    const pointField& pointLst = surf.points();
-    const List<Face>& faceLst  = surf.faces();
+    const pointField&  pointLst = surf.points();
+    const List<Face>&  faceLst  = surf.faces();
     const vectorField& normLst = surf.faceNormals();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
     unsigned int nTris = 0;
     if (surf.isTri())
@@ -200,9 +200,9 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeBINARY
     STLsurfaceFormatCore::writeHeaderBINARY(os, nTris);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], regionFaceI)
         {
             writeShell
             (
@@ -210,7 +210,7 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeBINARY
                 pointLst,
                 faceLst[faceIndex],
                 normLst[faceIndex],
-                patchI
+                regionI
             );
 
             ++faceIndex;
@@ -227,9 +227,9 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeBINARY
     const UnsortedMeshedSurface<Face>& surf
 )
 {
-    const pointField& pointLst = surf.points();
+    const pointField&  pointLst = surf.points();
     const List<Face>&  faceLst = surf.faces();
-    const List<label>& regionLst = surf.regions();
+    const List<label>& regionIds = surf.regionIds();
     const vectorField& normLst = surf.faceNormals();
 
     unsigned int nTris = 0;
@@ -258,7 +258,7 @@ void Foam::fileFormats::STLsurfaceFormat<Face>::writeBINARY
             pointLst,
             faceLst[faceI],
             normLst[faceI],
-            regionLst[faceI]
+            regionIds[faceI]
         );
     }
 }
@@ -295,10 +295,10 @@ bool Foam::fileFormats::STLsurfaceFormat<Face>::read
     // retrieve the original region information
     List<word>  names(reader.names().xfer());
     List<label> sizes(reader.sizes().xfer());
-    List<label> regions(reader.regions().xfer());
+    List<label> regionIds(reader.regionIds().xfer());
 
     // generate the (sorted) faces
-    List<Face> faceLst(regions.size());
+    List<Face> faceLst(regionIds.size());
 
     if (reader.sorted())
     {
@@ -314,7 +314,7 @@ bool Foam::fileFormats::STLsurfaceFormat<Face>::read
         // unsorted - determine the sorted order:
         // avoid SortableList since we discard the main list anyhow
         List<label> faceMap;
-        sortedOrder(regions, faceMap);
+        sortedOrder(regionIds, faceMap);
 
         // generate sorted faces
         forAll(faceMap, faceI)
@@ -323,18 +323,18 @@ bool Foam::fileFormats::STLsurfaceFormat<Face>::read
             faceLst[faceI] = triFace(startPt, startPt+1, startPt+2);
         }
     }
-    regions.clear();
+    regionIds.clear();
 
     // transfer:
     this->storedFaces().transfer(faceLst);
 
     if (names.size())
     {
-        this->addPatches(sizes, names);
+        this->addRegions(sizes, names);
     }
     else
     {
-        this->addPatches(sizes);
+        this->addRegions(sizes);
     }
 
     this->stitchFaces(SMALL);
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.H b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.H
index 0321f67acf..ebeeb7eafe 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormat.H
@@ -79,7 +79,7 @@ class STLsurfaceFormat
             const pointField&,
             const Face&,
             const vector&,
-            const label patchI
+            const label regionI
         );
 
 
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatASCII.L b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatASCII.L
index 520c22e0d5..14779d4d61 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatASCII.L
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatASCII.L
@@ -417,7 +417,7 @@ bool Foam::fileFormats::STLsurfaceFormatCore::readASCII
 
     // transfer to normal lists
     points_.transfer(lexer.points());
-    regions_.transfer(lexer.facets());
+    regionIds_.transfer(lexer.facets());
     names_.transfer(lexer.names());
     sizes_.transfer(lexer.sizes());
 
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.C
index 087f7d0d88..afe81aebac 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.C
@@ -142,14 +142,14 @@ bool Foam::fileFormats::STLsurfaceFormatCore::readBINARY
 #endif
 
     points_.setSize(3*nTris);
-    regions_.setSize(nTris);
+    regionIds_.setSize(nTris);
 
     Map<label> lookup;
     DynamicList<label> dynSizes;
 
     label ptI = 0;
     label regionI = -1;
-    forAll(regions_, faceI)
+    forAll(regionIds_, faceI)
     {
         // Read an STL triangle
         STLtriangle stlTri(is);
@@ -179,7 +179,7 @@ bool Foam::fileFormats::STLsurfaceFormatCore::readBINARY
             dynSizes.append(0);
         }
 
-        regions_[faceI] = regionI;
+        regionIds_[faceI] = regionI;
         dynSizes[regionI]++;
 
 #ifdef DEBUG_STLBINARY
@@ -220,7 +220,7 @@ Foam::fileFormats::STLsurfaceFormatCore::STLsurfaceFormatCore
 :
     sorted_(true),
     points_(0),
-    regions_(0),
+    regionIds_(0),
     names_(0),
     sizes_(0)
 {
diff --git a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.H
index f5463161e6..56607fa0a0 100644
--- a/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/stl/STLsurfaceFormatCore.H
@@ -65,7 +65,7 @@ class STLsurfaceFormatCore
         pointField points_;
 
         //- The regions associated with the faces
-        List<label> regions_;
+        List<label> regionIds_;
 
         //- The solid names, in the order of their first appearance
         List<word> names_;
@@ -124,7 +124,7 @@ public:
         {
             sorted_ = true;
             points_.clear();
-            regions_.clear();
+            regionIds_.clear();
             names_.clear();
             sizes_.clear();
         }
@@ -135,10 +135,10 @@ public:
             return points_;
         }
 
-        //- Return full access to the regions
-        List<label>& regions()
+        //- Return full access to the regionIds
+        List<label>& regionIds()
         {
-            return regions_;
+            return regionIds_;
         }
 
         //- The list of solid names in the order of their first appearance
diff --git a/src/surfMesh/surfaceFormats/surfaceFormatsCore.C b/src/surfMesh/surfaceFormats/surfaceFormatsCore.C
index 252773be6b..3552d4f404 100644
--- a/src/surfMesh/surfaceFormats/surfaceFormatsCore.C
+++ b/src/surfMesh/surfaceFormats/surfaceFormatsCore.C
@@ -37,7 +37,6 @@ Foam::word Foam::fileFormats::surfaceFormatsCore::nativeExt("ofs");
 
 // * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
-//- Check if file extension corresponds to 'native' surface format
 bool
 Foam::fileFormats::surfaceFormatsCore::isNative(const word& ext)
 {
@@ -75,11 +74,11 @@ Foam::fileFormats::surfaceFormatsCore::findMeshInstance
     // closest to and lower than current time
 
     instantList ts = d.times();
-    label i;
+    label instanceI;
 
-    for (i=ts.size()-1; i>=0; i--)
+    for (instanceI = ts.size()-1; instanceI >= 0; --instanceI)
     {
-        if (ts[i].value() <= d.timeOutputValue())
+        if (ts[instanceI].value() <= d.timeOutputValue())
         {
             break;
         }
@@ -88,13 +87,13 @@ Foam::fileFormats::surfaceFormatsCore::findMeshInstance
     // Noting that the current directory has already been searched
     // for mesh data, start searching from the previously stored time directory
 
-    if (i>=0)
+    if (instanceI >= 0)
     {
-        for (label j=i; j>=0; j--)
+        for (label i = instanceI; i >= 0; --i)
         {
-            if (file(d.path()/ts[j].name()/subdirName/foamName))
+            if (file(d.path()/ts[i].name()/subdirName/foamName))
             {
-                return ts[j].name();
+                return ts[i].name();
             }
         }
     }
@@ -116,11 +115,11 @@ Foam::fileFormats::surfaceFormatsCore::findMeshName
     // closest to and lower than current time
 
     instantList ts = d.times();
-    label i;
+    label instanceI;
 
-    for (i=ts.size()-1; i>=0; i--)
+    for (instanceI = ts.size()-1; instanceI >= 0; --instanceI)
     {
-        if (ts[i].value() <= d.timeOutputValue())
+        if (ts[instanceI].value() <= d.timeOutputValue())
         {
             break;
         }
@@ -129,11 +128,11 @@ Foam::fileFormats::surfaceFormatsCore::findMeshName
     // Noting that the current directory has already been searched
     // for mesh data, start searching from the previously stored time directory
 
-    if (i>=0)
+    if (instanceI >= 0)
     {
-        for (label j=i; j>=0; j--)
+        for (label i = instanceI; i >= 0; --i)
         {
-            fileName testName(d.path()/ts[j].name()/subdirName/foamName);
+            fileName testName(d.path()/ts[i].name()/subdirName/foamName);
 
             if (file(testName))
             {
@@ -166,14 +165,14 @@ Foam::fileFormats::surfaceFormatsCore::findMeshName
 }
 
 
-// Returns patch info.
-// Sets faceMap to the indexing according to patch numbers.
-// Patch numbers start at 0.
-Foam::surfGroupList
-Foam::fileFormats::surfaceFormatsCore::sortedPatchRegions
+// Returns region info.
+// Sets faceMap to the indexing according to region numbers.
+// Region numbers start at 0.
+Foam::surfRegionList
+Foam::fileFormats::surfaceFormatsCore::sortedRegionsById
 (
-    const UList<label>& regionLst,
-    const Map<word>& patchNames,
+    const UList<label>& regionIds,
+    const Map<word>& regionNames,
     labelList& faceMap
 )
 {
@@ -185,11 +184,11 @@ Foam::fileFormats::surfaceFormatsCore::sortedPatchRegions
     // Assuming that we have relatively fewer regions compared to the
     // number of items, just do it ourselves
 
-    // step 1: get region sizes and store (regionId => patchI)
+    // step 1: get region sizes and store (regionId => regionI)
     Map<label> lookup;
-    forAll(regionLst, faceI)
+    forAll(regionIds, faceI)
     {
-        const label regId = regionLst[faceI];
+        const label regId = regionIds[faceI];
 
         Map<label>::iterator fnd = lookup.find(regId);
         if (fnd != lookup.end())
@@ -202,52 +201,53 @@ Foam::fileFormats::surfaceFormatsCore::sortedPatchRegions
         }
     }
 
-    // step 2: assign start/size (and name) to the newPatches
-    // re-use the lookup to map (regionId => patchI)
-    surfGroupList patchLst(lookup.size());
+    // step 2: assign start/size (and name) to the newRegions
+    // re-use the lookup to map (regionId => regionI)
+    surfRegionList regionLst(lookup.size());
     label start = 0;
-    label patchI = 0;
+    label regionI = 0;
     forAllIter(Map<label>, lookup, iter)
     {
         label regId = iter.key();
 
         word name;
-        Map<word>::const_iterator fnd = patchNames.find(regId);
-        if (fnd != patchNames.end())
+        Map<word>::const_iterator fnd = regionNames.find(regId);
+        if (fnd != regionNames.end())
         {
             name = fnd();
         }
         else
         {
-            name = word("patch") + ::Foam::name(patchI);
+            name = word("region") + ::Foam::name(regionI);
         }
 
-        patchLst[patchI] = surfGroup
+        regionLst[regionI] = surfRegion
         (
             name,
             0,           // initialize with zero size
             start,
-            patchI
+            regionI
         );
 
-        // increment the start for the next patch
-        // and save the (regionId => patchI) mapping
+        // increment the start for the next region
+        // and save the (regionId => regionI) mapping
         start += iter();
-        iter() = patchI++;
+        iter() = regionI++;
     }
 
 
     // step 3: build the re-ordering
-    faceMap.setSize(regionLst.size());
+    faceMap.setSize(regionIds.size());
 
-    forAll(regionLst, faceI)
+    forAll(regionIds, faceI)
     {
-        label patchI = lookup[regionLst[faceI]];
-        faceMap[faceI] = patchLst[patchI].start() + patchLst[patchI].size()++;
+        label regionI = lookup[regionIds[faceI]];
+        faceMap[faceI] =
+            regionLst[regionI].start() + regionLst[regionI].size()++;
     }
 
     // with reordered faces registered in faceMap
-    return patchLst;
+    return regionLst;
 }
 
 
diff --git a/src/surfMesh/surfaceFormats/surfaceFormatsCore.H b/src/surfMesh/surfaceFormats/surfaceFormatsCore.H
index ee578fd415..46ee062bdf 100644
--- a/src/surfMesh/surfaceFormats/surfaceFormatsCore.H
+++ b/src/surfMesh/surfaceFormats/surfaceFormatsCore.H
@@ -36,11 +36,11 @@ SourceFiles
 #ifndef surfaceFormatsCore_H
 #define surfaceFormatsCore_H
 
-#include "surfPatchIdentifierList.H"
-#include "surfGroupList.H"
-#include "labelList.H"
 #include "Map.H"
 #include "HashSet.H"
+#include "labelList.H"
+#include "surfRegionList.H"
+#include "surfRegionIdentifierList.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -69,6 +69,7 @@ public:
     static word meshSubDir;
 
     //- The file extension corresponding to 'native' surface format
+    //  Normally "ofs" (mnemonic: OF = OpenFOAM, S = Surface)
     static word nativeExt;
 
     // Static Member Functions
@@ -91,12 +92,12 @@ public:
         //- Name of UnsortedMeshedSurface directory to use.
         static fileName findMeshName(const Time&);
 
-        //- Determine the sort order from the region list.
-        //  Returns patch list and sets faceMap to indices within faceLst
-        static surfGroupList sortedPatchRegions
+        //- Determine the sort order from the region ids.
+        //  Returns region list and sets faceMap to indices within faceLst
+        static surfRegionList sortedRegionsById
         (
-            const UList<label>& regionLst,
-            const Map<word>& patchNames,
+            const UList<label>& regionIds,
+            const Map<word>& regionNames,
             labelList& faceMap
         );
 
diff --git a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
index 7aaa1369e4..17110ab948 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.C
@@ -37,7 +37,7 @@ inline void Foam::fileFormats::TRIsurfaceFormat<Face>::writeShell
     Ostream& os,
     const pointField& pointLst,
     const Face& f,
-    const label patchI
+    const label regionI
 )
 {
     // simple triangulation about f[0].
@@ -54,7 +54,7 @@ inline void Foam::fileFormats::TRIsurfaceFormat<Face>::writeShell
             << p1.x() << ' ' << p1.y() << ' ' << p1.z() << ' '
             << p2.x() << ' ' << p2.y() << ' ' << p2.z() << ' '
             // region as colour
-            << "0x" << hex << patchI << dec << endl;
+            << "0x" << hex << regionI << dec << endl;
     }
 }
 
@@ -89,10 +89,10 @@ bool Foam::fileFormats::TRIsurfaceFormat<Face>::read
 
     // retrieve the original region information
     List<label> sizes(reader.sizes().xfer());
-    List<label> regions(reader.regions().xfer());
+    List<label> regionIds(reader.regionIds().xfer());
 
     // generate the (sorted) faces
-    List<Face> faceLst(regions.size());
+    List<Face> faceLst(regionIds.size());
 
     if (reader.sorted())
     {
@@ -108,7 +108,7 @@ bool Foam::fileFormats::TRIsurfaceFormat<Face>::read
         // unsorted - determine the sorted order:
         // avoid SortableList since we discard the main list anyhow
         List<label> faceMap;
-        sortedOrder(regions, faceMap);
+        sortedOrder(regionIds, faceMap);
 
         // generate sorted faces
         forAll(faceMap, faceI)
@@ -117,12 +117,12 @@ bool Foam::fileFormats::TRIsurfaceFormat<Face>::read
             faceLst[faceI] = triFace(startPt, startPt+1, startPt+2);
         }
     }
-    regions.clear();
+    regionIds.clear();
 
     // transfer:
     this->storedFaces().transfer(faceLst);
 
-    this->addPatches(sizes);
+    this->addRegions(sizes);
     this->stitchFaces(SMALL);
     return true;
 }
@@ -137,15 +137,15 @@ void Foam::fileFormats::TRIsurfaceFormat<Face>::write
 {
     const pointField& pointLst = surf.points();
     const List<Face>& faceLst  = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
-            writeShell(os, pointLst, f, patchI);
+            writeShell(os, pointLst, f, regionI);
         }
     }
 }
@@ -163,7 +163,7 @@ void Foam::fileFormats::TRIsurfaceFormat<Face>::write
 
     bool doSort = false;
     // a single region needs no sorting
-    if (surf.patches().size() == 1)
+    if (surf.regionToc().size() == 1)
     {
         doSort = false;
     }
@@ -171,25 +171,25 @@ void Foam::fileFormats::TRIsurfaceFormat<Face>::write
     if (doSort)
     {
         labelList faceMap;
-        List<surfGroup> patchLst = surf.sortedRegions(faceMap);
+        List<surfRegion> regionLst = surf.sortedRegions(faceMap);
 
         label faceIndex = 0;
-        forAll(patchLst, patchI)
+        forAll(regionLst, regionI)
         {
-            forAll(patchLst[patchI], patchFaceI)
+            forAll(regionLst[regionI], localFaceI)
             {
                 const Face& f = faceLst[faceMap[faceIndex++]];
-                writeShell(os, pointLst, f, patchI);
+                writeShell(os, pointLst, f, regionI);
             }
         }
     }
     else
     {
-        const List<label>& regionLst  = surf.regions();
+        const List<label>& regionIds  = surf.regionIds();
 
         forAll(faceLst, faceI)
         {
-            writeShell(os, pointLst, faceLst[faceI], regionLst[faceI]);
+            writeShell(os, pointLst, faceLst[faceI], regionIds[faceI]);
         }
     }
 }
diff --git a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.H b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.H
index 8afba85314..062e17be0c 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormat.H
@@ -69,7 +69,7 @@ class TRIsurfaceFormat
             Ostream&,
             const pointField&,
             const Face&,
-            const label patchI
+            const label regionI
         );
 
         //- Disallow default bitwise copy construct
diff --git a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.C
index e742d25983..0afd91d00f 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.C
@@ -43,7 +43,7 @@ Foam::fileFormats::TRIsurfaceFormatCore::TRIsurfaceFormatCore
 :
     sorted_(true),
     points_(0),
-    regions_(0),
+    regionIds_(0),
     sizes_(0)
 {
     read(filename);
@@ -83,10 +83,10 @@ bool Foam::fileFormats::TRIsurfaceFormatCore::read
     DynamicList<label> dynSizes;
     HashTable<label>   lookup;
 
-    // place faces without a group in patch0
+    // place faces without a group in region0
     label regionI = 0;
     dynSizes.append(regionI);
-    lookup.insert("patch0", regionI);
+    lookup.insert("regionI", regionI);
 
     while (is.good())
     {
@@ -132,13 +132,13 @@ bool Foam::fileFormats::TRIsurfaceFormatCore::read
 
         // Region/colour in .tri file starts with 0x. Skip.
         // ie, instead of having 0xFF, skip 0 and leave xFF to
-        // get read as a word and name it "patchFF"
+        // get read as a word and name it "regionFF"
 
         char zero;
         lineStream >> zero;
 
         word rawName(lineStream);
-        word name("patch" + rawName(1, rawName.size()-1));
+        word name("region" + rawName(1, rawName.size()-1));
 
         HashTable<label>::const_iterator fnd = lookup.find(name);
         if (fnd != lookup.end())
@@ -162,24 +162,24 @@ bool Foam::fileFormats::TRIsurfaceFormatCore::read
     }
 
     // skip empty groups
-    label nPatch = 0;
-    forAll(dynSizes, patchI)
+    label nRegion = 0;
+    forAll(dynSizes, regionI)
     {
-        if (dynSizes[patchI])
+        if (dynSizes[regionI])
         {
-            if (nPatch != patchI)
+            if (nRegion != regionI)
             {
-                dynSizes[nPatch] = dynSizes[patchI];
+                dynSizes[nRegion] = dynSizes[regionI];
             }
-            nPatch++;
+            nRegion++;
         }
     }
     // truncate addressed size
-    dynSizes.setCapacity(nPatch);
+    dynSizes.setCapacity(nRegion);
 
     // transfer to normal lists
     points_.transfer(dynPoints);
-    regions_.transfer(dynRegions);
+    regionIds_.transfer(dynRegions);
     sizes_.transfer(dynSizes);
 
     return true;
diff --git a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.H
index a41ee7b1e2..776f40e992 100644
--- a/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/tri/TRIsurfaceFormatCore.H
@@ -65,7 +65,7 @@ class TRIsurfaceFormatCore
         pointField points_;
 
         //- The regions associated with the faces
-        List<label> regions_;
+        List<label> regionIds_;
 
         //- The solid count, in the order of their first appearance
         List<label> sizes_;
@@ -104,7 +104,7 @@ public:
         {
             sorted_ = true;
             points_.clear();
-            regions_.clear();
+            regionIds_.clear();
             sizes_.clear();
         }
 
@@ -115,9 +115,9 @@ public:
         }
 
         //- Return full access to the regions
-        List<label>& regions()
+        List<label>& regionIds()
         {
-            return regions_;
+            return regionIds_;
         }
 
         //- The list of region sizes in the order of their first appearance
diff --git a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.C b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.C
index 7c9cf40a08..da52bd4d77 100644
--- a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.C
+++ b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.C
@@ -33,7 +33,7 @@ template<class Face>
 void Foam::fileFormats::VTKsurfaceFormat<Face>::writeHeaderPolygons
 (
     Ostream& os,
-    const List<Face>& faceLst
+    const UList<Face>& faceLst
 )
 {
     label nNodes = 0;
@@ -66,15 +66,15 @@ void Foam::fileFormats::VTKsurfaceFormat<Face>::write
 )
 {
     const List<Face>& faceLst = surf.faces();
-    const List<surfGroup>& patchLst = surf.patches();
+    const List<surfRegion>& regionLst = surf.regions();
 
     writeHeader(os, surf.points());
     writeHeaderPolygons(os, faceLst);
 
     label faceIndex = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
             const Face& f = faceLst[faceIndex++];
 
@@ -87,8 +87,7 @@ void Foam::fileFormats::VTKsurfaceFormat<Face>::write
         }
     }
 
-    // Print region numbers
-    writeTail(os, patchLst);
+    writeTail(os, regionLst);
 }
 
 
@@ -116,8 +115,7 @@ void Foam::fileFormats::VTKsurfaceFormat<Face>::write
         os << ' ' << nl;
     }
 
-    // Print region numbers
-    writeTail(os, surf.regions());
+    writeTail(os, surf.regionIds());
 }
 
 
diff --git a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.H b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.H
index 214d1f8c02..fe9f38621c 100644
--- a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.H
+++ b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormat.H
@@ -27,7 +27,7 @@ Class
 
 Description
     Provide a means of writing VTK legacy format.
-    The output is never sorted by patch.
+    The output is never sorted by region.
 
 SourceFiles
     VTKsurfaceFormat.C
@@ -63,7 +63,7 @@ class VTKsurfaceFormat
     // Private Member Functions
 
         //- Write header information about number of polygon points
-        static void writeHeaderPolygons(Ostream&, const List<Face>&);
+        static void writeHeaderPolygons(Ostream&, const UList<Face>&);
 
         //- Disallow default bitwise copy construct
         VTKsurfaceFormat(const VTKsurfaceFormat<Face>&);
diff --git a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.C b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.C
index f2b9141635..adbb487e14 100644
--- a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.C
+++ b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.C
@@ -58,13 +58,13 @@ void Foam::fileFormats::VTKsurfaceFormatCore::writeHeader
 void Foam::fileFormats::VTKsurfaceFormatCore::writeTail
 (
     Ostream& os,
-    const List<surfGroup>& patchLst
+    const UList<surfRegion>& regionLst
 )
 {
     label nFaces = 0;
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        nFaces += patchLst[patchI].size();
+        nFaces += regionLst[regionI].size();
     }
 
     // Print region numbers
@@ -74,22 +74,22 @@ void Foam::fileFormats::VTKsurfaceFormatCore::writeTail
         << "region 1 " << nFaces << " float" << nl;
 
 
-    forAll(patchLst, patchI)
+    forAll(regionLst, regionI)
     {
-        forAll(patchLst[patchI], patchFaceI)
+        forAll(regionLst[regionI], localFaceI)
         {
-            if (patchFaceI)
+            if (localFaceI)
             {
-                if ((patchFaceI % 20) == 0)
-                {
-                    os << nl;
-                }
-                else
+                if (localFaceI % 20)
                 {
                     os << ' ';
                 }
+                else
+                {
+                    os << nl;
+                }
             }
-            os  << patchI + 1;
+            os  << regionI + 1;
         }
         os  << nl;
     }
@@ -99,30 +99,30 @@ void Foam::fileFormats::VTKsurfaceFormatCore::writeTail
 void Foam::fileFormats::VTKsurfaceFormatCore::writeTail
 (
     Ostream& os,
-    const List<label>& regionLst
+    const UList<label>& regionIds
 )
 {
     // Print region numbers
     os  << nl
-        << "CELL_DATA " << regionLst.size() << nl
+        << "CELL_DATA " << regionIds.size() << nl
         << "FIELD attributes 1" << nl
-        << "region 1 " << regionLst.size() << " float" << nl;
+        << "region 1 " << regionIds.size() << " float" << nl;
 
 
-    forAll(regionLst, faceI)
+    forAll(regionIds, faceI)
     {
         if (faceI)
         {
-            if ((faceI % 20) == 0)
-            {
-                os << nl;
-            }
-            else
+            if (faceI % 20)
             {
                 os << ' ';
             }
+            else
+            {
+                os << nl;
+            }
         }
-        os  << regionLst[faceI] + 1;
+        os  << regionIds[faceI] + 1;
     }
     os  << nl;
 }
diff --git a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.H b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.H
index 4cec29b1c9..a68b4197ca 100644
--- a/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.H
+++ b/src/surfMesh/surfaceFormats/vtk/VTKsurfaceFormatCore.H
@@ -64,11 +64,11 @@ protected:
         const pointField&
     );
 
-    //- Write trailing information with patch information
-    static void writeTail(Ostream&, const List<surfGroup>&);
-
     //- Write trailing information with region information
-    static void writeTail(Ostream&, const List<label>& regionLst);
+    static void writeTail(Ostream&, const UList<surfRegion>&);
+
+    //- Write trailing information with region Ids
+    static void writeTail(Ostream&, const UList<label>& regionIds);
 
 };