651 Second indicator: Value 0 - Library of Congress Subject Headings

Value 0 indicates that the subject added entry conforms to the Library of Congress Subject Headings (LCSH) that is maintained by the Library of Congress. Use of value 0 requires that the heading be appropriate for use in LCSH.

Conforms to LCSH is defined as:

geographic headings (or geographic headings and subdivisions) found in the LC authority files (including name authorities for non-natural features), or in the latest edition of LCSH, including the latest microfiche, printed version, CD-ROM, and supplements;

geographic headings for non-natural features constructed following AACR 2 ;

geographic headings found in the LC authority files, the latest edition of LCSH, or constructed following AACR 2 (for non-natural features only) to which is added a free-floating or regular subdivision according to the rules stated in the Subject Cataloging Manual: Subject Headings, particularly subdivisions listed in the pattern lists, and subdivisions formulated and applied according to the rules in the manual.

Value 0 is an authoritative-agency data element .