Bug 136270 Group's data binding column can only be used by the group itself
If you add some data binding columns to a group, these columns can only be used by this group itself. It should has a way to make the child can use the parent group's data binding column.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
ELEMENT_LABELCONTENT_PROPERTY );
		
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.LINE_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.TEMPLATE_REPORT_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.FREE_FORM_ITEM ) );
		notSupportList.add( DesignEngine.getMetaDataDictionary( )
				.getElement( ReportDesignConstants.GRAPHIC_MASTER_PAGE_ELEMENT ) );
	}
	/**
	 * Gets the support list of the given parent element and the slotID.
	 * 
	 * @param parent
	 *            the parent element
	 * @param slotId
	 *            the slotID
	 * @return the element list that is supported with the given parent element
	 *         and in the given slotID
	 */
	public static List getElementSupportList( DesignElementHandle parent,
			int slotId )
	{
		List list = new ArrayList( );
		ISlotDefn slotDefn = parent.getDefn( ).getSlot( slotId );
		if ( slotDefn != null )
		{
			list.addAll( slotDefn.getContentExtendedElements( ) );
			list.removeAll( notSupportList );