pdf file - The CIDOC CRM

Object HierarchyAll entities in this hierarchy are instances of the metaclass “Object Type”. Two submetaclasses are defined, the“Physical Object Type” for the hierarchy of the “Physical Objects”, the kinds of things which have weight, arecreated once and can be destroyed, and the “Concept Type” for the “Concepts”, the intellectual or otherproducts which are created once, and can exist on multiple carriers, and hence can rather be forgotten or lost thandestroyed.Definition of the CIDOC Conceptual Reference Model 30