3.2.2. CIDOC Conceptual Reference Model (CRM) and Erlangen CRM (ECRM)

Use of the ISO-standardized ontology CIDOC CRM (ISO 21127) as a semantic backbone

→ www.cidoc-crm.org 
The CIDOC Conceptual Reference Model (CRM) is defined as a formal ontology that supports the integration, mediation and exchange of differently structured cultural heritage information. Consequently, CRM essentially defines the underlying semantics (meaning) of database schemata and document structures, i.e. it describes the explicit and implicit terms used for cultural heritage and museum documentation and their relationships. 

The CIDOC CRM is a paper document that lists semantic definitions and definitions of cultural heritage. Erlangen CRM was developed in order to use the semantics of CIDOC CRM technically. It is the technical implementation of the classes and properties of CIDOC CRM. 
→ http://erlangen-crm.org/