In case anyone wants to have a go, here’s the ddc/lcsh data I extracted from the LC 2007 retrospective file [1]: http://inkdroid.org/data/dewey-lcsh.gz The file contains ddc/lcsh combinations from 2,909,673 records. //Ed [1] https://archive.org/details/marc_records_scriblio_net On Dec 10, 2013, at 6:11 PM, Roy Tennant <[log in to unmask]> wrote: > Has anyone looked at using the Classify web service for this? [1] It > doesn't have a batch mode, but it has a web service [2]. > Roy > > [1] http://oclc.org/research/activities/classify.html > [2] http://classify.oclc.org/classify2/api_docs/index.html > > > On Tue, Dec 10, 2013 at 2:53 PM, Kyle Banerjee <[log in to unmask]>wrote: > >> This is my inclination. However, if the algorithm doesn't incorporate >> values from the tables used to synthesize Dewey numbers, identifying the >> stems of numbers may be tricky. It might be worth calling up someone at a >> major Dewey library like UIUC or Northwestern to see if they might be >> willing to provide data to add to what you get from LC. >> >> kyle >> >> >> On Tue, Dec 10, 2013 at 1:18 PM, Edward Summers <[log in to unmask]> wrote: >> >>> Not a naive idea at all. If you have the stomach for it, you could >> extract >>> the Subject Heading / Dewey combinations out of say the LC Catalog MARC >>> data [1] to use as training data for some kind of clustering [2] >> algorithm. >>> You might even be able to do something simple like keep a count of the >>> Dewey ranges associated with each subject heading. >>> >>> I’m kind of curious myself, so I could work on getting the subject >> heading >>> / dewey combinations if you want? >>> >>> //Ed >>> >>> [1] https://archive.org/details/marc_records_scriblio_net >>> [2] https://en.wikipedia.org/wiki/Cluster_analysis >>> >>> On Dec 10, 2013, at 8:18 AM, Irina Arndt <[log in to unmask]> wrote: >>> >>>> Hi CODE4LIB, >>>> >>>> we would like to add DDC classes to a bunch of MARC records, which >>> contains only LoC Subject Headings. >>>> Does anybody know, if a mapping between LCSH and DDC is anywhere >>> existent (and available)? >>>> >>>> I understood, that WebDewey >>> http://www.oclc.org/dewey/versions/webdewey.en.html might provide such >> a >>> service, but >>>> >>>> · we are no OCLC customers or subscribers to WebDewey >>>> >>>> · even if we were, I'm not sure, if the service matches our >> needs >>>> >>>> I'm thinking of a tool, where I can upload my list of subject headings >>> and get back a list, where the matching Dewey classes have been added >> (but >>> a 'simple' csv file with LCSH terms and DDC classes would be helpful as >>> well- I am fully aware, that neither LCSH nor DDC are simple at all...) . >>> Naïve idea...? >>>> >>>> Thanks for any clues, >>>> Irina >>>> >>>> >>>> ------- >>>> >>>> Irina Arndt >>>> Max Planck Digital Library (MPDL) >>>> Library System Coordinator >>>> Amalienstr. 33 >>>> D-80799 Muenchen, Germany >>>> >>>> Tel. +49 89 38602-254 >>>> Fax +49 89 38602-290 >>>> >>>> Email: [log in to unmask]<mailto:[log in to unmask]> >>>> http://www.mpdl.mpg.de >>> >>