Library of Congress

Cataloging Distribution Service

The Library of Congress > Cataloging Distribution Service > MARC Documentation > MARC 21 Format for Authority Data
MARC 21 Format for Authority Data: Including Guidelines for Content Designation
Network Development and MARC Standards Office, Library of Congress
1999 edition with Updates 1 - 13 interfiled
Publication Date:
Free download
Discontinued print product. MARC 21 formats and their updates are available free on the Library of Congress MARC web site.

Format for records to communicate standard forms for names of persons and organizations, series titles, uniform titles, and subject terms that are used in bibliographic records. The format also includes fields for cross-references, for linking to headings in other thesauri, and for indicative treatment for series. Important for catalog consistency; essential for participants in cooperative authority file programs such as NACO.
Included in Cataloger's Desktop

Related links:
Concise format
MARC Web Site

Introduction to MARC Documentation

Machine-Readable Cataloging (MARC) is the standard in library automation, forming the backbone of today's automated library systems, networks, and bibliographical utilities. The Library of Congress MARC products set the standard for MARC cataloging documentation. Available in Cataloger's Desktop and free online on the Library's MARC web site,

> more about MARC Documentation