The LRMoo Working Group of the Bibliographic Conceptual Models Review Group is pleased to invite your responses in the world-wide review of LRMoo.

LRMoo is the object-oriented formulation of the IFLA Library Reference Model, and is the successor to FRBRoo, the object-oriented formulation of the original FR models, FRBR, FRAD, FRSAD, which was approved as an IFLA standard in 2016.

LRMoo is formulated as a compatible extension to the museum community’s conceptual model, the CIDOC Conceptual Reference Model and is aligned with version 7.1.2 of CIDOC CRM. LRMoo issues from a long-standing cross-community collaboration between IFLA and ICOM (International Council of Museums) through its CIDOC CRM Special Interest Group.

LRMoo version 0.9.3 (82 pages) is available online and may be downloaded at:

Two ways to comment:

  • send comments by email to the chair of the LRMoo WG, Pat Riva, at

  • comment on specific topics by adding a comment directly to the document in Google Drive

In all cases, send your response by end of day Friday, March 31, 2023.

LRMoo Working Group (members Pat Riva, Trond Aalberg, and Maja Zumer)