This class represents selections made by the user. It holds information about the object, document and sub-element of the selection. Remove this selection item from the selection. This object becomes invalid. Test for a certain father class. Name of the selected object Name of the selected sub-element if any Name of the selected object Type name of the selected object Name of the document of the selected object Selected document Selected object Selected sub-element, if any Picked points for selection Selected sub-element, if any