Three reports describe the standards and format to be used when contributing bibliographic records to MELVYL, the University of California (UC) online library catalog. The first report, which was revised and approved in May 1990, defines record format standards, record maintenance information standards, bibliographic fields, local data fields, relationship of bibliographic and holdings records, transaction tapes, tape frequency, backup or input by submitting library, changing to a new system for MELVYL input, tape characteristic standards, and character set standards. The second report, which was approved in revised form in July 1988, defines the minimum data elements required for inclusion of a cataloging record in the UC union catalog. The third report, prepared by Karen Coyle and revised in June 1991, focuses on the MELVYL catalog local data format, including a description of record structure, diagrams of catalog records, a detailed list of data fields, and local data fields. Examples that illustrate the normalization of variable data formats are included. (KRN)