[OAI-implementers] XSD file for qualified DC
Carl Lagoze
lagoze@cs.cornell.edu
Thu, 13 Jun 2002 14:53:48 -0400
Interesting discussions from all. As Herbert points out in another mail, this is an opportunity for some interesting cooperative work. I think we all agree that 'citation-type' metadata is useful. Tim's example at http://citebase.eprints.org/cgi-bin/oai?verb=GetRecord&metadataPrefix=dcq&identifier=oai:arXiv:hep-th/0102001 demonstrates how one might make available for harvesting not only the citation data for a resource but its list of references.
My personal perspective is that trying to shoehorn these requirments into the DC element structure is probably the wrong approach. It relies on a notion of DC Structured Values, the status of which is pretty uncertain with in DCMI and for which there is no well-defined data model. It also seems to take the approach of DC as a root format on which to build further expressive structrues, rather than as one metadata format among many. Wouldn't a better approach be to exploit the reality we now have realized in OAI: that is, availability of multiple parallel metadata formats? SHouldn't citation and reference metadata be packaged as a metadata format parallel to DC (qualified or unqualified)? Sure there is some duplication of information with DC (e.g., yes a citation has a title) but, taking the view that the metadata format exposed for harvesting is just a database view, I don't think that this is really a relevant argument.
So, a proposal. Let's move this reference/citations metadata requirement out from under the notion of 'application profile' for DC or qualifiers for DC and see if there can be some agreement on a good XML schema (profile) for making this information harvestable via OAI-PMH.
Probably if people like Tim and Ann put there heads together on this, possibly with the contributions of Simeon Warner and Thomas Krickel, we could come up with something that could fit into a revised version of the OAI implementation guidelines document.
Carl
Carl Lagoze
Senior Research Associate, Computing and Information Science, Cornell University
Director of Technology, National Science Digital Library
Open Archives Initiative Executive
Upson Hall
Ithaca, NY 14853
Phone: 607-255-6046
FAX: 607-255-4428
URL: http://www.cs.cornell.edu/lagoze
-----Original Message-----
From: Ann Apps [mailto:ann.apps@man.ac.uk]
Sent: Thursday, June 13, 2002 10:06 AM
To: Tim Brody
Cc: oai-implementers@oaisrv.nsdl.cornell.edu
Subject: Re: [OAI-implementers] XSD file for qualified DC
Tim,
An excellent idea but... The DC Citation work has not yet been
endorsed by the DCMI, so it will not be part of the DCQ schema.
The current proposal by the DCMI Citation Working Group was just
for a Dublin Core Structured Value (DCSV) which contained the
sub-elements for citation. So it is really just a literal string for the
element value, which could be parsed if you know how. Even this
has not yet been agreed on as a DCMI recommendation, mainly
because they haven't yet made a decision on DCSVs.
The DC Citation WG work plan includes the definition of a 'DC-Cite'
application profile, which I think would translate into an XML
schema. But moving this forward was waiting on the endorsement
of the above DCSV (perhaps there is no need to wait).
I would very much like to see a DC-Citation schema used by the
OAI community. But until this moves forward in DC, it would be a
'local' profile.
Best wishes,
Ann
From: "Tim Brody" <tim@tim.brody.btinternet.co.uk>
To: "Carl Lagoze" <lagoze@cs.cornell.edu>, "Stuart Chalk" <schalk@unf.edu>,
<oai-implementers@oaisrv.nsdl.cornell.edu>
Subject: Re: [OAI-implementers] XSD file for qualified DC
Date sent: Thu, 13 Jun 2002 12:50:14 +0100
> Hi Carl,
>
> I would be _very_ interested in a DCQ schema that included the DC
> Citation work (dc.identifier.citation refinement).
>
> I've been playing around with the DC cite concepts:
> http://citebase.eprints.org/cgi-bin/oai?verb=GetRecord&metadataPrefix=
> dcq&id entifier=oai:arXiv:hep-th/0102001
>
> (pretend its properly schema'd and '_' is ':')
>
> I would like to expose a "standard" format (which isn't marc) to allow
> others to use Citebase bibliographic data, and DCQ+DC Citation would
> seem to be ideal for this purpose.
>
> Do you have a timescale for producing a DCQ schema?
>
> All the best,
> Tim B.
>
> ----- Original Message -----
> From: "Carl Lagoze" <lagoze@cs.cornell.edu>
> To: "Stuart Chalk" <schalk@unf.edu>;
> <oai-implementers@oaisrv.nsdl.cornell.edu>
> Sent: Wednesday, June 12, 2002 8:55 PM
> Subject: RE: [OAI-implementers] XSD file for qualified DC
>
>
> > Stuart,
> >
> > Indeed there is not yet a xml schema for qualified DC. Encouraged
> > by the
> success of (finally) producing a schema for unqualified Dublin Core
> (the one referenced in the OAI-PMH v2 specification at
> http://dublincore.org/schemas/xmls/simpledc20020312.xsd) a number of
> us in the DC and OAI community are in the midst of producing such a
> schema. The timetable is for a solid proposal middle of next month
> with closure on the process by October. > > Carl > > Carl Lagoze >
> Senior Research Associate, Computing and Information Science >
> Director of Technology, National Science Digital Library > Open
> Archives Initiative Executive > Upson Hall > Ithaca, NY 14853 > Phone:
> 607-255-6046 > FAX: 607-255-4428 > URL:
> http://www.cs.cornell.edu/lagoze > > -----Original Message----- >
> From: Stuart Chalk [mailto:schalk@unf.edu] > Sent: Wednesday, June 12,
> 2002 1:42 PM > To: oai-implementers@oaisrv.nsdl.cornell.edu > Subject:
> [OAI-implementers] XSD file for qualified DC > > > Maybe I missed it
> but where can I find the XSD for qualified DC? > > There are several
> websites that have XSDs for DC in RDF etc. but they > mostly say they
> are beta versions. > > If there is not one yet, who would be the right
> person to convince to do > it? I have thought of trying myself...but
> as I am new I don't want to > tread on anyones toes (as it were). > >
> Stuart Chalk, Ph.D.
> Phone:904-620-2831 > Associate Professor of Chemistry
> Fax:904-620-3885 > Department of Chemistry and Physics
> "The Flow Analysis Database" > University of North Florida
> http://www.fia.unf.edu/ > 4567 St. Johns Bluff Road S.
> "The Analytical Sciences Digital Library" > Jacksonville FL 32224
> USA http://asdl.coas.unf.edu/ > >
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