Provides access to, and information about, its children and descendants viewed either as properties or as contained elements.
Groups are static collections within the hierarchy.
The number and names of contained elements are fixed in advance and each child may have a different type. This service subsumes two alternate ways of accessing child and descendent elements. See also GroupElement Child objects of this service generally implement service GroupElement. See also SetAccess A complementary service providing for dynamic homogeneous sets of elements. Description is the basic service for accessing child and descendent nodes using a view of the tree as a hierarchy of properties and subproperties.