diff --git a/EGkColor.h b/EGkColor.h
index 17bfdd4..f780159 100644
--- a/EGkColor.h
+++ b/EGkColor.h
@@ -35,21 +35,21 @@ class Color
               m_Col[GREEN] = (( dGreen < 0) ? 0 : (( dGreen > 1) ? MAX_RGB : int( dGreen * MAX_RGB))) ;
               m_Col[BLUE] = (( dBlue < 0) ? 0 : (( dBlue > 1) ? MAX_RGB : int( dBlue * MAX_RGB))) ;
               m_Col[ALPHA] = (( dAlpha < 0) ? 0 : (( dAlpha > 1) ? MAX_ALPHA : int( dAlpha * MAX_ALPHA))) ; }
-      int GetIntRed( void)
+      int GetIntRed( void) const
             { return m_Col[RED] ; }
-      int GetIntGreen( void)
+      int GetIntGreen( void) const
             { return m_Col[GREEN] ; }
-      int GetIntBlue( void)
+      int GetIntBlue( void) const
             { return m_Col[BLUE] ; }
-      int GetIntAlpha( void)
+      int GetIntAlpha( void) const
             { return m_Col[ALPHA] ; }
-      float GetRed( void)
+      float GetRed( void) const
             { return ( (float) m_Col[RED] / MAX_RGB) ; }
-      float GetGreen( void)
+      float GetGreen( void) const
             { return ( (float) m_Col[GREEN] / MAX_RGB) ; }
-      float GetBlue( void)
+      float GetBlue( void) const
             { return ( (float) m_Col[BLUE] / MAX_RGB) ; }
-      float GetAlpha( void)
+      float GetAlpha( void) const
             { return ( (float) m_Col[ALPHA] / MAX_ALPHA) ; }
       bool operator == ( const Color& other)
             { return ( m_Col[RED] == other.m_Col[RED] &&
diff --git a/EGkGdbIterator.h b/EGkGdbIterator.h
index fcfe8d2..b78c960 100644
--- a/EGkGdbIterator.h
+++ b/EGkGdbIterator.h
@@ -38,11 +38,13 @@ class __declspec( novtable) IGdbIterator
       virtual GdbType  GetGdbType( void) const = 0 ;
       virtual IGeoObj* GetGeoObj( void) = 0 ;
       virtual IGeoFrame3d* GetGeoFrame( void) = 0 ;
-      virtual bool GetGroupFrame( Frame3d& frGlob) = 0 ;
-      virtual bool GetGroupGlobFrame( Frame3d& frGlob) = 0 ;
-      virtual int  GetId( void) = 0 ;
-      virtual int  GetParentId( void) = 0 ;
-      virtual bool GetGlobFrame( Frame3d& frGlob) = 0 ;
+      virtual bool GetGroupFrame( Frame3d& frGlob) const = 0 ;
+      virtual bool GetGroupGlobFrame( Frame3d& frGlob) const = 0 ;
+      virtual int  GetId( void) const = 0 ;
+      virtual int  GetParentId( void) const = 0 ;
+      virtual bool GetGlobFrame( Frame3d& frGlob) const = 0 ;
+      virtual bool SetColor( Color cCol) = 0 ;
+      virtual bool GetColor( Color& cCol) const = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------
diff --git a/EGkGeomDB.h b/EGkGeomDB.h
index 8c42bf0..723ea62 100644
--- a/EGkGeomDB.h
+++ b/EGkGeomDB.h
@@ -16,6 +16,7 @@
 #include "/EgtDev/Include/EGkGdbConst.h"
 #include "/EgtDev/Include/EGkGeoFrame3d.h"
 #include "/EgtDev/Include/EGkGeoObj.h"
+#include "/EgtDev/Include/EGkColor.h"
 #include "/EgtDev/Include/EGtILogger.h"
 #include <string>
 
@@ -36,7 +37,7 @@ class __declspec( novtable) IGeomDB
       virtual bool Clear( void) = 0 ;
       virtual bool Load( const std::string& sFileIn) = 0 ;
       virtual bool Save( const std::string& sFileOut) const = 0 ;
-      virtual bool ExistsNode( int nId) const = 0 ;
+      virtual bool ExistsObj( int nId) const = 0 ;
       virtual int  AddGroup( int nId, int nParentId, const Frame3d& frFrame) = 0 ;
       virtual int  AddGeoObj( int nId, int nParentId, IGeoObj* pGeoObj) = 0 ;
       virtual GdbType GetGdbType( int nId) const = 0 ;
@@ -44,7 +45,7 @@ class __declspec( novtable) IGeomDB
       virtual IGeoFrame3d* GetGeoFrame( int nId) = 0 ;
       virtual bool GetGroupFrame( int nId, Frame3d& frGrp) const = 0 ;
       virtual bool GetGroupGlobFrame( int nId, Frame3d& frGlob) const = 0 ;
-      virtual int  GetGroupNodes( int nId) const = 0 ;
+      virtual int  GetGroupObjs( int nId) const = 0 ;
       virtual int  GetParentId( int nId) const = 0 ;
       virtual bool GetGlobFrame( int nId, Frame3d& frGlob) const = 0 ;
       virtual bool GetLocalBBox( int nId, BBox3d& b3Loc) const = 0 ;
@@ -63,6 +64,10 @@ class __declspec( novtable) IGeomDB
       virtual bool ScaleGlob( int nId, const Frame3d& frRef, double dCoeffX, double dCoeffY, double dCoeffZ) = 0 ;
       virtual bool Mirror( int nId, const Point3d& ptOn, const Vector3d& vtNorm) = 0 ;
       virtual bool MirrorGlob( int nId, const Point3d& ptOn, const Vector3d& vtNorm) = 0 ;
+      virtual bool DumpAttributes( int nId, std::string& sOut, const char* szNewLine) const = 0 ;
+      virtual bool SetDefaultColor( Color cCol) = 0 ;
+      virtual bool SetColor( int nId, Color cCol) = 0 ;
+      virtual bool GetColor( int nId, Color& cCol) const = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------