Thursday, September 08, 2011

Permalink Service for Authority Data Available at LC

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The Library of Congress is pleased to announce an expansion of its LCCN Permalink Service for the Library's name and subject authority records. These persistent URLs are based on the Library of Congress Control Number (LCCN). As with bibliographic records, LCCN Permalinks are displayed on authority record entries in LC Authorities.

Create an LCCN Permalink
Simply begin your URL with the LCCN Permalink domain name -- -- then add an LCCN.
Examples: or

LCCNs should be formatted according to the info:lccn URI specification. Instructions are also available in the LCCN Permalink FAQ.

How LCCN Permalink Works
An LCCN Permalink retrieves a MARCXML-formatted record using the Z39.50/SRU protocol. Both valid and cancelled LCCNs (MARC 21 fields 010a and 010z) are searched. Authority record displays for LCCN Permalink follow the labelled display found in LC Authorites. MARCXML and MADS versions of the records are also available. Displays link to entries in LC Authorities and the LC Online Catalog -- and, where appropriate, to entries in the Virtual International Authority File and LC Authorities and Vocabularies.