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<TITLE>RE: [OAI-implementers] on the OAI-PMH data model</TITLE>
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<P><FONT SIZE=2>Hi,<BR>
<BR>
I think the idea with this distinction is that there may be multiple items that disseminate different assertions (but in the same metadataFormat) about the same resource. Example: Bob's item about the resource <A HREF="http://w3.org/">http://w3.org/</A> says the dc:title is "The W3C", and Cindy's items says the dc:title is "The homepage of the W3C".<BR>
<BR>
- Chris<BR>
<BR>
-----Original Message-----<BR>
From: oai-implementers-bounces@openarchives.org on behalf of Fabio Simeoni<BR>
Sent: Thu 3/17/2005 11:26 AM<BR>
To: oai-implementers@openarchives.org<BR>
Subject: [OAI-implementers] on the OAI-PMH data model<BR>
<BR>
<BR>
hi,<BR>
I don't think this has been directly brought up before on the list<BR>
(apologies otherwise).<BR>
<BR>
When writing up about the protocol's exchange model, I found myself<BR>
wondering about the *necessity* of the item-resource distinction, which is<BR>
otherwise very clear. Given that the unit of exchange remains the metadata<BR>
record, what design considerations suggested to identify full abstract<BR>
descriptions of resources rather than the resources themselves? IOW, as a<BR>
data provider or aggregator, what problems do I incur into by reading a<BR>
getrecord request as one for a record in a given format about a resource<BR>
with a given identifier? Isn't it indeed the case that DPs at the edge of<BR>
the OAI network generate/map OAI identifiers from internal resource<BR>
identifiers? As I wonder how the relationship item-resource could not<BR>
possibly be one-to-one, the question seems at least licit. Perhaps I am<BR>
missing something obvious here. Any suggestion?<BR>
<BR>
cheers,<BR>
<BR>
f<BR>
<BR>
<BR>
<BR>
##############################################<BR>
Fabio Simeoni<BR>
Research Fellow<BR>
Department of Computer & Information Sciences<BR>
University of Strathclyde, Glasgow<BR>
<BR>
TEL: +44 141 548 (3590)<BR>
FAX: +44 141 548 (4523)<BR>
<BR>
<BR>
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