http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Library of Congress rule interpretations for AACR 2, 1988 revision
a cumulation through Cataloging service bulletin number
Office for Descriptive Cataloging Policy.
compiled with quarterly looseleaf supplements by Alan Boyd and Elaine Druesedow.
Formulated by the Office for Descriptive Cataloging Policy, Library of Congress.