Apologies for cross posting.

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<http://authorities.loc.gov>.

Create an LCCN Permalink
Simply begin your URL with the LCCN Permalink domain name -- 
http://lccn.loc.gov/ -- then add an LCCN.
       Examples:  http://lccn.loc.gov/n79018774   or   
http://lccn.loc.gov/sh85026371
LCCNs should be formatted according to the 
info:lccn<http://info-uri.info/registry/OAIHandler?verb=GetRecord&metadataPrefix=reg&identifier=info:lccn/>
 URI specification. Instructions are also available in the LCCN Permalink 
FAQ<http://lccn.loc.gov/lccnperm-faq.html#n9>.

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<http://authorities.loc.gov> and the LC Online 
Catalog<http://catalog.loc.gov> -- and, where appropriate, to entries in the 
Virtual International Authority File<http://viaf.org> and LC Authorities and 
Vocabularies<http://id.loc.gov/>.

More Information
Additional information on this service is available on the LCCN Permalink 
FAQ<http://lccn.loc.gov/lccnperm-faq.html>. Specific questions can also be sent 
to the Library of Congress through 
Ask-A-Librarian<http://www.loc.gov/rr/askalib/ask-digital.html>.

Ardie Bausenbach
ILS Program Office
Library of Congress
[email protected]<mailto:[email protected]>

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