It's funny this subject just came up on one of the open-library discussion lists this week [1]. A whiles ago now Rob Sanderson, Brian Rhea (University of Liverpool) and I pulled down the LC Classification Outline pdf files, converted them to text, wrote a python munger to convert the text into what ended up being a SKOS RDF file. We made the code available [2] and you can see the resulting SKOS (which needs some URI work) [3]. It's kind of a work in progress (still). I wanted to get to the point that the rdf file was leveraged in a little python library (possibly as a pickled data structure) for easily validating LC numbers and looking them up in the outline. I'd be interested in any feedback. //Ed [1] http://mail.archive.org/pipermail/ol-lib/2007-September/000069.html [2] http://inkdroid.org/svn/lcco-skos/trunk/rdfizer/ [3] http://inkdroid.org/tmp/lcco.rdf