The BIBFRAME model and vocabulary consider resources that are cataloged as works with corresponding instances (physical and/or electronic). The metadata describing a work is an amalgamation of the some of the data that was formerly associated with the uniform title authority record combined with subject data that was associated with the bibliographic records. Thus each cataloging resource must have a work description, and, if the cataloging resource exists physically or electronically, one or more instance descriptions. @en
(2019-03-25) Pierre-Yves Vandenbussche: Bibframe moved to v2 and changed its URI. The previous URI http://bibframe.org/vocab is now deprecated and not used anymore.
We changed this record to the new URI http://id.loc.gov/ontologies/bibframe/