Owen-

We assign ARKs[1] to our objects (and predicates for that matter).  The issue of reconciling against other sources hasn't come as much, since we have mostly focused on our unique objects.  But we have worked on that issue some.  For example, several years ago, I worked on the UCAI project, where we mapped several slide collections to a common schema[2] and did quite a bit of work trying to build work records for the collections that didn't have them, and match work records across collections.  That project didn't produce a copy-cataloging service like we'd hoped, though the Getty is now working on a registry[3] of works of art, which would the task of matching records a lot simpler.

1. https://wiki.ucop.edu/display/Curation/ARK
2. http://www.loc.gov/standards/vracore/
3. http://www.getty.edu/research/tools/vocabularies/cona/index.html

-Esme
--
Esme Cowles <[log in to unmask]>

"In the old days, an operating system was designed to optimize the
 utilization of the computer's resources. In the future, its main goal
 will be to optimize the user's time." -- Jakob Nielsen

On 12/2/2011, at 1:37 PM, Owen Stephens wrote:

> Oh - and perhaps just/more importantly - how do you create URIs for you data and how do you reconcile against other sources?
> 
> Owen
> 
> On 2 Dec 2011, at 16:07, Esme Cowles <[log in to unmask]> wrote:
> 
>> Owen-
>> 
>> Another strategy for capturing MARC data in RDF is to convert it to MODS (we do this using the LoC MARC to MODS stylesheet: http://www.loc.gov/standards/marcxml/xslt/MARC21slim2MODS.xsl).  From there, it's pretty easy to incorporate into RDF.  There are some issues to be aware of, such as how to map the MODS XML names to predicates and how to handle elements that can appear in multiple places in the hierarchy.
>> 
>> -Esme
>> --
>> Esme Cowles <[log in to unmask]>
>> 
>> "Necessity is the plea for every infringement of human freedom. It is the
>> argument of tyrants; it is the creed of slaves." -- William Pitt, 1783
>> 
>> On 11/28/2011, at 8:25 AM, Owen Stephens wrote:
>> 
>>> It would be great to start collecting transforms together - just a quick brain dump of some I'm aware of
>>> 
>>> MARC21 transformations
>>> Cambridge University Library - http://data.lib.cam.ac.uk - transformation made available (in code) from same site
>>> Open University - http://data.open.ac.uk - specific transform for materials related to teaching, code available at http://code.google.com/p/luceroproject/source/browse/trunk%20luceroproject/OULinkedData/src/uk/ac/open/kmi/lucero/rdfextractor/RDFExtractor.java (MARC transform is in libraryRDFExtraction method)
>>> COPAC - small set of records from the COPAC Union catalogue - data and transform not yet published
>>> Podes Projekt - LinkedAuthors - documentation at http://bibpode.no/linkedauthors/doc/Pode-LinkedAuthors-Documentation.pdf - 2 stage transformation firstly from MARC to FRBRized version of data, then from FRBRized data to RDF. These linked from documentation
>>> Podes Project - LinkedNonFiction - documentation at http://bibpode.no/linkednonfiction/doc/Pode-LinkedNonFiction-Documentation.pdf - MARC data transformed using xslt https://github.com/pode/LinkedNonFiction/blob/master/marcslim2n3.xsl
>>> 
>>> British Library British National Bibliography - http://www.bl.uk/bibliographic/datafree.html - data model documented, but no code available
>>> Libris.se - some notes in various presentations/blogposts (e.g. http://dc2008.de/wp-content/uploads/2008/09/malmsten.pdf) but can't find explicit transformation
>>> Hungarian National library - http://thedatahub.org/dataset/hungarian-national-library-catalog and http://nektar.oszk.hu/wiki/Semantic_web#Implementation - some information on ontologies used but no code or explicit transformation (not 100% sure this is from MARC)
>>> Talis - implemented in several live catalogues including http://catalogue.library.manchester.ac.uk/  - no documentation or code afaik although some notes in 
>>> 
>>> MAB transformation
>>> HBZ - some of the transformation documented at https://wiki1.hbz-nrw.de/display/SEM/Converting+the+Open+Data+from+the+hbz+to+BIBO, don't think any code published?
>>> 
>>> Would be really helpful if more projects published their transformations (or someone told me where to look!)
>>> 
>>> Owen
>>> 
>>> Owen Stephens
>>> Owen Stephens Consulting
>>> Web: http://www.ostephens.com
>>> Email: [log in to unmask]
>>> Telephone: 0121 288 6936
>>> 
>>> On 26 Nov 2011, at 15:58, Karen Coyle wrote:
>>> 
>>>> A few of the code4lib talk proposals mention projects that have or will transform MARC records into RDF. If any of you have documentation and/or examples of this, I would be very interested to see them, even if they are "under construction."
>>>> 
>>>> Thanks,
>>>> kc
>>>> 
>>>> -- 
>>>> Karen Coyle
>>>> [log in to unmask] http://kcoyle.net
>>>> ph: 1-510-540-7596
>>>> m: 1-510-435-8234
>>>> skype: kcoylenet