+ >-- DN.Mapping.EdgeMapping.ElevationAttribute --> L0.String <R L0.HasProperty
+
+
+// Allowed connection types
+DN.SupplyConnectionType <T STR.ConnectionType
+
+DN.SupplyInConnectionType : DN.SupplyConnectionType : STR.InputDirection
+ STR.SupportsDirection DN.SupplyOutConnectionType
+ STR.ConnectionType.isUserSelectable true
+
+DN.SupplyOutConnectionType : DN.SupplyConnectionType : STR.OutputDirection
+ STR.SupportsDirection DN.SupplyInConnectionType
+ STR.ConnectionType.isUserSelectable true
+
+DN.ReturnConnectionType <T STR.ConnectionType
+
+DN.ReturnInConnectionType : DN.ReturnConnectionType : STR.InputDirection
+ STR.SupportsDirection DN.ReturnOutConnectionType
+ STR.ConnectionType.isUserSelectable true
+
+DN.ReturnOutConnectionType : DN.ReturnConnectionType : STR.OutputDirection
+ STR.SupportsDirection DN.ReturnInConnectionType
+ STR.ConnectionType.isUserSelectable true