Bibliographic input standards

These Bibliographic Input Standards are brief and not intended to be used independently. Rather, they should be used for MARC bibliographic database maintenance along with all CCS documentation and OCLC manuals.

The Bibliographic Input Standards Committee was formed to review current CCS data entry practice, identify problem areas, examine OCLC input standards, and make recommendations for CCS bibliographic input standards. As a result, OCLC Level I Input Standards have been adopted. Level I represents full cataloging rather than minimal level cataloging. Level I corresponds to the second level of description found in AACR2, 2002 revision, Rule 1.0D2. CCS is committed to upgrading all OCLC records to Level I quality.

The latest version of OCLC's Level I Input Standards can be found in Bibliographic Formats and Standards. For each field and subfield, the Level I Input Standard is given first, followed by Level K; for example, "Required/Optional" means the field is required for Level I but optional for Level K. See the Input Standards section of the Bibliographic Formats & Standards Overview for more information. (OCLC's standards are, in turn, based on the MARC21 National Full & Minimal Requirements.)

In Bibliographic Formats & Standards and below:

• Mandatory indicates that the information must always be input.
• Required indicates that the information must be input if it is applicable and present on the piece or in the cataloging source.
• Retain indicates that the information must be kept if it is found in the cataloging source, but not necessarily supplied by the local cataloger.
• Obsolete indicates that the tag is no longer used. To find out if the field data should be re-tagged, consult the online version of OCLC's Bibliographic Formats and Standards

Fixed field elements in each format should be checked for accuracy and filled in if required or mandatory (OCLC Level I standards).

For original entries, OCLC guidelines apply.

The following table documents instances where CCS practice is at variance with OCLC input standards.

FF	Definition	Comments
AccM	Accompanying matter	Required
Audn	Target audience	Required
Biog	Biography	Required
Comp	Form of composition	Required
Cont	Nature of contents	Required
EntW	Nature of entire work	Required
File	Type of computer file	Required
Ills	Illustrations	Required
Indx	Index	Required
LitF	Literary Form (formerly Fiction)	Required
Tech	Technique	Required
Tag	Field Name	Comments
015	National Bibliography Number	Retain
016	National Bibliographic Agency Control Number	Retain
019	OCLC Control Number Cross-Reference	Retain
050	Library of Congress Class. No.	Retain
082	Dewey Decimal Call No.	Retain
092	Locally Assigned Dewey Call Number	Retain
257	Country of production	Required (for video recordings only)
260 or 264	Publication, distribution, etc.	MANDATORY
340	Physical medium	Required (for large print material only)
345	Projection characteristics	Retain
346	Video characteristics	Required
520	Summary, etc. note	Retain
521	Target audience note	Required
580	Linking entry complexity note	Retain
655	Index term, genre/form	Required
760	Main series entry	Required
762	Subseries entry	Required
765	Original language entry	Required
856	Electronic location and access	Required
936	Dates or Volume Designations of Last Issue Consulted	Retain