Merge from branch giga

StgSharp.Model/Step/Items/StepTopologicalRepresentationItem.cs

@@ -28,15 +28,29 @@
 //     
 //-----------------------------------------------------------------------
 //-----------------------------------------------------------------------
+using StgSharp.Model.Step;
 using StgSharp.Script;
 using StgSharp.Script.Express;
 
-namespace StgSharp.Modeling.Items
+using System;
+
+namespace StgSharp.Model.Step
 {
-    public abstract class StepTopologicalRepresentationItem : StepRepresentationItem
+    public class StepTopologicalRepresentationItem : StepRepresentationItem, IExpConvertableFrom<StepTopologicalRepresentationItem>
     {
 
-        protected StepTopologicalRepresentationItem( string name ) : base( name ) { }
+        protected StepTopologicalRepresentationItem( StepModel model ) : base( model ) { }
+
+        public void FromInstance( StepTopologicalRepresentationItem entity )
+        {
+            base.FromInstance( entity );
+        }
+
+        public override bool IsConvertableTo( string entityName )
+        {
+            return base.IsConvertableTo( entityName ) ||
+                   entityName == "StepTopologicalRepresentationItem";
+        }
 
     }
 }