On 9 Aug 2010, at 13:32, William Waites wrote: > On 10-08-09 12:19, Jodi Schneider wrote: >> >> What happens when the LCSH heading changes? > > Does this happen? Yes, more often than you'd think. John Mark Ockerbloom analyzed his online books catalog recently, and found out that "286 unique subjects that needed replacement– over 3/4 of 1% of my headings, in less than 4 years." That's in a small catalog with 40,000 records (1% of the size of UPenn's). He made some changes (e.g. Cookery to Cooking) along the way when he heard about changes. http://everybodyslibraries.com/2010/07/31/keeping-subjects-up-to-date-with-open-data/ Ockerbloom's solution -- using RDF from the LC authorities and vocabularies service -- is a nice example of using open data, and his scripts might be useful for libraries that do this, along with manual flags. > How is this handled now? Do > libraries have to go and redo their entire > catalogues? Good question - any catalog maintainers around to say? > > I'm just guessing but I would think that they > would add headings from time to time but they > would rarely if ever delete or change an existing > one. Although I could be very wrong... See the post for examples, alas. I'm looking for a list of the *kinds* of changes and deletions made. > > Cheers, > -w > > -- > William Waites <william.waites@okfn.org> > Mob: +44 789 798 9965 Open Knowledge Foundation > Fax: +44 131 464 4948 Edinburgh, UK > > RDF Indexing, Clustering and Inferencing in Python > http://ordf.org/Received on Monday, 9 August 2010 13:02:50 GMT
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