Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-12 Thread Simon Spero
I've did some mining of DDC/LCSH correlations from the scriblio.net LC files (Dec 2006 - ~ 7m records) as an experiment a long time ago; I should see if I can find the right repo. I was looking at 1st 6XX <-> 082 associations as evidence for or against LCSH syndetic structure. I didn't do anyth

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-11 Thread Jonathan Rochkind
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 da

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-11 Thread Jonathan Rochkind
I was looking for this last month (there may even be a thread in the archives from me on it); I didn't anything very suitalbe. The only potentially useful thing I found, is that id.loc.gov does include mappings for _some but not all_ LCSH authority records. I think these mappings were included

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-11 Thread Bryan Baldus
>Thanks everyone for your responses- especially for pointing out the classify >web service, which was new to me. Speaking of OCLC's Classify service, MarcEdit [1] includes a feature that makes use of Classify to generate call numbers. [1] http://marcedit.reeset.net/ I hope this helps, Bryan B

[CODE4LIB] AW: [CODE4LIB] Mapping LCSH to DDC

2013-12-11 Thread Irina Arndt
Thanks everyone for your responses- especially for pointing out the classify web service, which was new to me. >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/lcs

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Edward Summers
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,

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Roy Tennant
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 wrote:

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Kyle Banerjee
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 p

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Karen Coyle
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 fie

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Bryan Baldus
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 u

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Edward Summers
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 Women's rights -- United States -- History -- Sources. Women -- United States -- Hist

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Karen Coyle
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 mi

Re: [CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Edward Summers
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 De

[CODE4LIB] Mapping LCSH to DDC

2013-12-10 Thread Irina Arndt
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