The codes should not be used in exchange records until after January 14, 2006. This 60-day waiting period is required to provide MARC 21 implementers time to include newly defined codes in any validation tables they may apply to the MARC fields where the codes are used.
The following code is for use in subfield $2 in field 506 (Restrictions on Access Note) in Bibliographic and Holdings records.
- Standardized terminology for access restriction (DLF/OCLC Registry of Digital Masters Working Group) http://purl.oclc.org/NET/506Vocabulary [use after January 14, 2006]
The following codes are for use in subfield $2 in Bibliographic and Community Information records in 6xx fields and in subfield $f in field 040 (Cataloging Source) in Authority records.
- Qâ'imat ru'ûs mawdû'ât al-fahras al-'Arabîyah al-mowahad = Arabic Union Catalog Subject Headings [use after January 14, 2006]
- Tesauro SPINES: un vocabulario controlado y estructurado para el tratamiento de información sobre ciencia y tecnología para el desarrollo (Madrid: UNESCO, ICYT) [use after January 14, 2006]
- British Library newspaper place names (London: British Library) [use after January 14, 2006]