var brCr = workbookBox.getDataView().getBreadcrumb();				
	var mattr = brCr.getMetaAttributes().getItem(0);
	var item = mattr._BreadcrumbItem;
	//Get the PP.TS.Ui.MetaAttribute object by attribute identifier
	var metaattr = brCr.getMetaAttributeById(item.getId());				
	//Get drop-down panel corresponding to attribute from the obtained attribute
	var panel = metaattr.getDropPanel();
	//Expand panel
	showPanel();
	var attr = metaattr.getAttribute();
	alert("Name of the attribute, for which panel is expanded - " + attr.n);
	//To show working of the getTree() method of the PP.TS.Ui.MetaAttribute class of the object named metaattr, get 
	//attribute dimension tree
	var dimTree = metaattr.getTree();
	//Set selection to all dimension tree nodes
	dimTree.selectAll();
	//Refresh all tree structure
	dimTree.refreshAll();
	//All dimension tree nodes are selected on the drop-down panel. 
				
	var removeSelButt = new PP.Ui.Button({
		ParentNode: document.body, //DOM parent node
		Content: "Remove selection", //Text      
		Click: PP.Delegate(onClickRemoveSel)     
	});			
	function onClickRemoveSel(){
		//Remove selected attributes
		mattr.removeFromSelected(); 
		showPanel();
	}		
				
	function showPanel()
	{
		//Calculate coordinates of the top left corner of the drop-down panel 
		var visibilityObject = panel.isVisibleArea(0, 0);
		var coords = PP.calculateOffset(item._DomNode);
		var top = coords.Y + item._DomNode.offsetHeight + 1;
		var left = 0;
		if (brCr.getIsRTL())
			left = coords.X + item._DomNode.offsetWidth - visibilityObject.Width + 1;
		else
			left = coords.X - 1;	
		//Display the drop-down panel in the specified place
		panel.show(left, top);					
	}