OCLC Bibliographic Formats and Standards

OCLC Bibliographic Formats and Standards
http://www.oclc.org/bibformats/en/

Bibliographic Formats and Standards is a guide to machine-readable cataloging records in WorldCat. It provides tagging conventions, input standards and guidelines for entering information into WorldCat.

Biblographic Formats and Standards assumes you are familiar with Anglo-American Cataloguing Rules, second edition, 2004 Revision, and other standard cataloging reference material. Some sections also assume you have a general knowledge of data processing and databases.

It provides all the Marc tags explanation, e.g., 0xx to 9xx fields in PDF files

Source of information:

http://www.oclc.org/bibformats/en/