Yeah, Ed! I'm totally looking forward to results. Unlikely as it is, if
there's anything I can do....
and I understand about limiting to 650, but ... well, let's see how it goes.
kc
On 12/10/13, 1:37 PM, Edward Summers wrote:
I was going to try to reduce the space a bit by focusing on 650 fields. Each
record with a Dewey number will be a tab separated line, that will include each
650 field in order. So something like:
305.42/0973 <tab> Women's rights -- United States -- History -- Sources. <tab> Women
-- United States -- History — Sources <tab> Manuscripts, American -- Facsimiles.
I thought it might be a place to start at least … it’s running on an ec2
instance right now :-)
//Ed
On Dec 10, 2013, at 4:26 PM, Karen Coyle <[email protected]> wrote:
I've often thought that this would be an interesting exercise if someone would
undertake it.
Just a reminder: in theory (IN THEORY) the first subject heading in an LC
record is the one most semantically close to the assigned subject
classification. So perhaps a first pass with the FIRST 6xx might give a more
refined matching. And then it would be interesting to compare that with the
results using all 600-651's.
kc
On 12/10/13, 1:18 PM, Edward Summers 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 <[email protected]> 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: [email protected]<mailto:[email protected]>
http://www.mpdl.mpg.de
--
Karen Coyle
[email protected] http://kcoyle.net
m: 1-510-435-8234
skype: kcoylenet
--
Karen Coyle
[email protected] http://kcoyle.net
m: 1-510-435-8234
skype: kcoylenet
