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
{
			return false;
		}
		if ( insertObj instanceof Object[] )
		{
			Object[] array = (Object[]) insertObj;
			if ( !checkSameDataSetInMultiColumns( array ) )
			{
				return false;
			}
			for ( int i = 0; i < array.length; i++ )
			{
				if ( !handleValidateInsertToLayout( array[i], targetPart ) )
				{
					return false;
				}
			}
			return true;
		}
		else if ( insertObj instanceof IStructuredSelection )
		{
			return handleValidateInsertToLayout( ( (IStructuredSelection) insertObj ).toArray( ),
					targetPart );
		}
		else if ( insertObj instanceof DataSetHandle )
		{
			return isHandleValid( (DataSetHandle) insertObj )
					&& ( (DataSetHandle) insertObj ).getDataSource( ) != null
					&& handleValidateDataSet( targetPart );
		}