 It is intended to be a common language for domain experts and implementers to formulate requirements for information systems and to serve as a guide for good practice of conceptual modelling.In this way, it can provide the "semantic glue" needed to mediate between different sources of cultural heritage information, such as that published by museums, libraries and archives.By adopting formal semantics for the CIDOC CRM, the pre-conditions for machine-to-machine interoperability and integration have been established.