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
* @param dropPart
	 * @return validate result
	 */
	protected static boolean handleValidateParameterDropContainer(
			EditPart dropPart )
	{
		if ( dropPart.getParent( ) == null )
		{
			return false;
		}
		Object container = dropPart.getParent( ).getModel( );
		return ( container instanceof GridHandle
				|| container instanceof TableHandle
				|| container instanceof FreeFormHandle
				|| container instanceof ListHandle || dropPart.getModel( ) instanceof ModuleHandle );
	}
	/**
	 * Validates drop target from data set in data view.
	 * 
	 * @return validate result
	 */
	protected static boolean handleValidateDataSet( EditPart target )
	{
		return handleValidateDataSetDropContainer( target )
				&& DNDUtil.handleValidateTargetCanContainType( target.getModel( ),
						ReportDesignConstants.TABLE_ITEM );
	}
	/**
	 * Validates drop target from data set column in data view.
	 *