Michael,
There is in fact a group of us within DC who are continuing work on XML
schema, as a follow on to the work that produced the simple DC schema.
We are currently hoping that this work will produce results in time for
the dc meeting in October (Florence).
Can you be clearer about your phrase "a number of extensions". There
has been considerable discussion over the last several years in the DC
community regarding how to best model extensibility in Dublin Core. In
particular, these discussions have centered on the richness of
information that can be expressed using DC elements without disrupting
inter-application interoperability. As a reference point you might take
a look at http://dublincore.org/documents/dcmes-qualifiers/ and
http://dublincore.org/documents/2002/04/14/dc-xml-guidelines/. You will
note from both of this documents that the accepted model for Dublin Core
based metadata places some fairly tight constraints on extensibility.
These constraints will be reflected in the XML schema that we are
developing.
Also, if you wish to move into the RDF world you might look at
http://dublincore.org/documents/2002/04/14/dcq-rdf-xml/. This work is a
little more experimental in nature but offers some possibilities on how
richer information might be encoded.
Carl Lagoze
Carl Lagoze
Department of Computer Science
Cornell University
Ithaca, NY 14853 USA
Voice: +1-607-255-6046
FAX: +1-607-255-4428
EMail: [log in to unmask]
WWW: http://www.cs.cornell.edu/lagoze
> -----Original Message-----
> From: Michael Magee [mailto:[log in to unmask]]
> Sent: Wednesday, May 22, 2002 5:15 PM
> To: [log in to unmask]
> Subject: Dublin Core XML Schema
>
>
> This is just a general question about the simple schema
> developed for DC. I am currently designing a system to store
> cultural heritage documents for the Canadian Heritage project
> and they are currently using DC within a relational
> structure. Unfortunately they have a number of extensions
> that aren't defined by a XML schema or DTD. We are using a
> metadata software entry tool called ALOHA which will ingest
> the metadata schema and create a entry screen based on that
> schema so we need to develop an extended schema. It will
> then store the record as schema-validated CML. I was
> wondering if anyone had worked on creating an extended schema
> for DC? Any examples would be helpful. It will be important
> later on as well when we start looking at making the records
> interoperable with IMS and MARC.
>
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