Bug 119331 Library - name space terminology and behavior
During BIRT 2.0 library feature review meeting the following change was decided. - Change the term namespace to 'prefix' - By default use the library name as the prefix ( namespace ); the dialog to input prefix should be prompted only if hte auto generated prefix is not unique.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
Object target, Object targetParent ) throws SemanticException
	{
		Assert.isNotNull( insertObj );
		Assert.isNotNull( target );
		if ( insertObj instanceof DataSetHandle )
		{
			return performInsertDataSet( (DataSetHandle) insertObj );
		}
		else if ( insertObj instanceof DataSetItemModel )
		{
			return performInsertDataSetColumn( (DataSetItemModel) insertObj,
					target,
					targetParent );
		}
		else if ( insertObj instanceof ScalarParameterHandle )
		{
			return performInsertParameter( (ScalarParameterHandle) insertObj );
		}
		else if ( insertObj instanceof String )
		{
			
			return performInsertString( (String) insertObj, target );
		}
		else if ( insertObj instanceof Object[] )
		{
			return performMultiInsert( (Object[]) insertObj,
					target,
					targetParent );
		}
		else if ( insertObj instanceof IStructuredSelection )