9xx Introduction

9xx fields are not part of the MARC format. OCLC defines them for the Library of Congress, for local processing, and for internal OCLC use.

Use fields 910, 936, 945–949, 956, 984 and 987 as defined in this chapter.

OCLC products and services use some 9xx fields for processing. OCLC does not retain these fields in the master record. They may be retained in archival records, however, depending on the needs of the product or service.

For example, field 951 is used for agent specific data for cataloging agent authorizations. Field 952 is used for error reporting in the online system. See section 5.9, " Submitting Errors via Connexion," for details. This manual does not include descriptions of these fields.

The WorldCat Cataloging Partners service also uses some 9xx fields to supply nonbibliographic information. Because WorldCat Cataloging Partners 9xx fields are defined by agreement between a library and a vendor, this manual does not include descriptions of these fields. OCLC removes WorldCat Cataloging Partners-defined 9xx fields from master records.

Field 938 (Vendor Specific Ordering Data) is system-supplied by OCLC to support Vendor Record Contribution and other OCLC services. It is retained in the master record. A description of field 938 is included in this manual.