Ah right it's ClassificationWeb that has this. Alas, ClassificationWeb
is both not open (requires a subscription), and also, as far as I know,
offers no machine API, it's purely manual human access.
This would definitely be an interesting project for someone to do to
create a source of open data on LCSH/LCC correlations. Somewhat
challenging, but definitely not 'rocket science' as they say. I think
the data would be desirable by many.
Also, as I mentioned in another email, some but not all LCSH authority
records already identify suggested correspoinding LCC's; LCSH authority
data can be obtained from id.loc.gov among other places.
On 12/10/13 5:02 PM, Bryan Baldus wrote:
On Tuesday, December 10, 2013 7:18 AM, Irina Arndt wrote:
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'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...?
Classification Web offers a correlations feature between Dewey and the 1st
LCSH, based on usage in LC's database (as well as correlations between LCC and
LCSH, and DDC and LCC). It is of some use in helping the cataloger determine
possible classifications or subject headings to use. Unfortunately, I don't
believe ClassWeb is easily accessible by automated processes (even for
subscribers). Even if it were, I doubt it is possible to automate a process of
assigning Dewey based on 1st LCSH. As mentioned, the 1st LCSH and
classification are generally supposed to be similar/linked, but that applies
more to LCC/LCSH than DDC to LCSH, due to the way Dewey works. For example,
ClassWeb correlation between LCSH Disease management (chosen while looking at
Health, then Disease, then looking for an example showing a better variety of
Deweys than the 1st 2) shows DDCs used by LC (counts of records in parentheses):
Disease management [Topical]
362.1 (4)
610.285 (1)
615.1 (1)
615.5071 (1)
616.89142 (1)
####
That said, as Ed mentioned, given a large set of records for training, you
should be able to develop something to help local catalogers determine possible
Deweys record-by-record.
I hope this helps,
Bryan Baldus
Senior Cataloger
Quality Books Inc.
The Best of America's Independent Presses
1-800-323-4241x402
bryan.bal...@quality-books.com
