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Eric, Use bath.isbn, for example: http://z3950.loc.gov:7090/voyager?operation=searchRetrieve&version=1.1&query=bath.isbn=0136142230&recordSchema=mods&startRecord=1&maximumRecords=10 We also have an index called bath.standardIdentifier which includes ISBNs, ISSNs, and LCCNs. (I know, it's not mentioned in the explain record.) http://www.loc.gov/z39voy?operation=searchRetrieve&version=1.1&recordSchema=marcxml&startRecord=1&maximumRecords=10&query=bath.standardIdentifier=0844410462 Larry On Wed, 2 May 2007, Eric Lease Morgan wrote: > Given the explain record at the other end of the following URL, how > do I query the Library of Congress for an ISBN number: > > http://z3950.loc.gov:7090/voyager > > For example, I see the following in the explain output but I don't > know how to turn that into a query: > > <index id="7"> > <title>isbn</title> > <map><name set="bath">isbn</name></map> > </index> > > Something like this returns an "Unsupported index" error: > > http://z3950.loc.gov:7090/voyager? > operation=searchRetrieve&version=1.1&query=isbn=0300077491 > > -- > Eric "Feeling Embarrassed" Morgan > University Libraries of Notre Dame > > (574) 631-8604 ------------------------------------------------------------ Larry E. Dixson Internet: [log in to unmask] Network Development and MARC Standards Office, LA327 Library of Congress Telephone: (202) 707-5807 Washington, D.C. 20540-4402 Fax: (202) 707-0115