See the glossary entries for:
or the entire glossary.
Class of all Property Items (foundation class) Title of this Item
Property_Item Name of this Item
This category item is the base of the hierarchy of items that are properties. It is a class, and is therefore identified as such by the connection "Property_Item is_instance_of Item_Class". The absolute requirement to identify items as being "property type" (as opposed to individual or category) is to specify that when they are created. However, most properties will also be identified as such by the existence of either the connection "[property] sub_property_of [another property]" or "[property] is_instance_of [another property class]". In the second of these connection forms "another property class" will be either Property_Item or one of its children. Description of this Item
