In 2008 the FRBR/CRM Harmonisation Working Group has achieved a major milestone: a complete version of the object-oriented definition of FRBR (FRBRoo) was released for comment. After a brief overview of the history and context of the Working Group, this paper focuses on the primary contributions resulting from this work. o FRBRoo is a self-contained document which expresses the concepts of FRBR using the object-oriented methodology and framework of CIDOC CRM. It is an alternative view on

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... conceptualisation for a different purpose, not a replacement for FRBR. o This 'translation' process presented an opportunity to verify and confirm FRBR's internal consistency. o FRBRoo offers a common view of library and museum documentation as two kinds of information from memory institutions. Such a common view is necessary to provide interoperable information systems for all users interested in accessing common or related content. o The analysis provided an opportunity for mutual enrichment of FRBR and CIDOC CRM. Examples include: o Addition of the modelling of time and events to FRBR, which can be seen in its application to the publishing process o Clarification of the manifestation entity o Explicit modelling of performances and recordings in FRBR o Adding the work entity to CRM o Adding the identifier assignment process to CRM. o Producing a formalisation which is more suited for implementation with object-oriented tools, and which facilitates the testing and adoption of FRBR concepts in implementations with different functional specifications and in different environments. 2