diff --git a/EGkGeomDB.h b/EGkGeomDB.h
index d9c09d4..144d627 100644
--- a/EGkGeomDB.h
+++ b/EGkGeomDB.h
@@ -56,14 +56,19 @@ class __declspec( novtable) IGeomDB
       virtual bool Erase( int nId) = 0 ;
       virtual bool Translate( int nId, const Vector3d& vtMove) = 0 ;
       virtual bool TranslateGlob( int nId, const Vector3d& vtMove) = 0 ;
+      virtual bool TranslateGroup( int nId, const Vector3d& vtMove) = 0 ;
       virtual bool Rotate( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) = 0 ;
       virtual bool RotateGlob( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) = 0 ;
+      virtual bool RotateGroup( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) = 0 ;
       virtual bool Rotate( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) = 0 ;
       virtual bool RotateGlob( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) = 0 ;
+      virtual bool RotateGroup( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) = 0 ;
       virtual bool Scale( int nId, const Frame3d& frRef, double dCoeffX, double dCoeffY, double dCoeffZ) = 0 ;
       virtual bool ScaleGlob( int nId, const Frame3d& frRef, double dCoeffX, double dCoeffY, double dCoeffZ) = 0 ;
+      virtual bool ScaleGroup( 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 MirrorGroup( int nId, const Point3d& ptOn, const Vector3d& vtNorm) = 0 ;
      // selection
       virtual bool SelectObj( int nId) = 0 ;
       virtual bool DeselectObj( int nId) = 0 ;