On 8/28/07, Roy Tennant <[log in to unmask]> wrote: > the files at <http://www.loc.gov/catdir/cpso/lcco/> The files Roy mentions are a great start, and might be enough for your purposes. But they don't go into the full gory detail of the classification. For example, if you are interested in QA934, you can only get as close as: "QA801-939 Analytic mechanics" If you do need the full, detailed classification, LC's "Classification Web" appears to be based on a set of MARC records. Here's an example for QA934: -------------------- ID: CF 94037268 Rec Stat: n Entrd: 930427 Used: 19960528 CNID: DLC Rec Type: w KOR: a NumType: a Val: a Opt: a Enc Levl: n Syn: a Dis: a 010 $a CF 94037268 040 $a DLC $c DLC 084 0 $a lcc 153 $a QA934 $h Mathematics $h Analytic mechanics $h Elasticity. Plasticity $j Torsion 753 $a Torsion $b Analytic mechanics Record: 85693 Added: Tue Apr 27 00:00:00 1993 Modified: Tue May 28 10:09:38 1996 -------------------- The drawback is that these records only appear to be available through the subscription-accessed "Classification Web". I couldn't find any mention of the availability of the actual MARC records on the Cataloging Distribution Service website. Maybe LC will make them available via a free RESTful web service... :) -Keith