Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/PropertyCommand.java
if ( ICellModel.COL_SPAN_PROP.equalsIgnoreCase( propName )
					|| ICellModel.ROW_SPAN_PROP.equalsIgnoreCase( propName )
					|| ICellModel.DROP_PROP.equalsIgnoreCase( propName )
					|| ICellModel.COLUMN_PROP.equalsIgnoreCase( propName ) )
			{
				throw new PropertyValueException(
						element,
						prop,
						value,
						PropertyValueException.DESIGN_EXCEPTION_PROPERTY_CHANGE_FORBIDDEN );
			}
		}
		if ( element instanceof MasterPage )
		{
			
			
			
			propName = prop.getName( );
			if ( !( (MasterPage) element ).isCustomType( module )
					&& ( IMasterPageModel.WIDTH_PROP.equals( propName ) || IMasterPageModel.HEIGHT_PROP
							.equals( propName ) ) )
			{
				throw new SemanticError( element,
						SemanticError.DESIGN_EXCEPTION_CANNOT_SPECIFY_PAGE_SIZE );
			}
		}
		value = validateValue( prop, value );
		if ( element instanceof GroupElement
				&& IGroupElementModel.GROUP_NAME_PROP.equals( prop.getName( ) ) )
		{