Serials and multiple versions, or the inexorable trend toward work-level displays

The proliferation of multiple versions for bibliographic works presents numerous challenges to the cataloger and, by extension, to the catalog user Fifteen years after the Multiple Versions Forum held in Airlie, Virginia, online public access catalog (OPAC) users continue to grapple with confusing displays representing numerous serial manifestations (i.e., versions) resulting from the Anglo-American Cataloguing Rules' (AACR2) cardinal principle (Rule 0.24). Two initiatives offer hope for more coherent OPAC displays in light of a renewed focus upon user needs: the ongoing revision of AACR2, and the International Federation of Library Associations and Institutions' Functional Requirements for Bibliographic Records (FRBR) model. A third potential tool for improving OPAC displays exists within a series of standards that have developed to parallel library needs, and today offer a robust communications medium: the MARC 21 authority, biblio-graphic and holdings formats. This paper summarizes multiple versions and presents an analysis of current and emerging solutions.