This document contains several lists of codes intended for use in MARC 21 Authority, Bibliographic, Classification, and Community Information records. The lists contain a total of 434 discrete codes, several of which are obsolete.
Some codes appear on more than one list.
Part I contains a list of relator terms and their associated codes. The purpose of this list is to allow the relationship between a name and a work to be designated by codes in the MARC record. Category Code Sources. Part II contains a list of works that are sources of codes which categorize a bibliographic item. Part III contains a list of sources of classification schemes for government documents and a other types of publications.