Abstract parent class of all spatial data types.

Declaration :

• C++ : class ITEM_STRUCTURE : public DATA_STRUCTURE
• Java : public abstract class ITEM_STRUCTURE extends DATA_STRUCTURE

Directly inherited by : ITEM_LIST ITEM_SINGLE ITEM_TABLE ITEM_TREE

Artifact : ITEM_STRUCTURE

All public operations : as_hierarchy , concept , is_archetype_root , item_at_path , items_at_path , parent , path_exists , path_of_item , path_unique