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
* Creates multiple objects
	 * 
	 * @param array
	 *            multiple creation source
	 * @param target
	 * @param targetParent
	 * @return first creation in layout
	 * @throws SemanticException
	 */
	protected static DesignElementHandle performMultiInsert( Object[] array,
			Object target, Object targetParent ) throws SemanticException
	{
		DesignElementHandle result = null;
		MultiItemsExpandRule rule = new MultiItemsExpandRule( array, target );
		if ( rule.canInsert( ) )
		{
			Object[] positions = (Object[]) rule.getInsertPosition( );
			if ( positions != null )
			{
				for ( int i = 0; i < array.length; i++ )
				{
					DesignElementHandle newObj = performInsert( array[i],
							positions[i],
							targetParent );
					if ( i == rule.getFocusIndex( ) )
					{
						result = newObj;
					}
					else
					{