RE: ZING : Implementing SRW

> Could you go into some more detail about this?  How would one 
> define a 
> query using a URL? 

In the ARTISTE system all query items are described by RDF schemas, either published by external standards bodies (e.g. the Dublin Core schema at http://dublincore.org/2001/08/14/dces) or written as part of ARTISTE (e.g. the Artiste Core  at http://artiste.it-innovation.soton.ac.uk/rdf/ArtisteCore.rdf). Each metadata attribute therefore has a URI
	e.g.   http://dublincore.org/2001/08/14/dces#title

Queries are composed using the metadata RDF URIs, and subsequently translated to SQL at each site using a mapping which relates these metadata RDF URIs to individual database table and field names. For example in the collection for Gallery A http://dublincore.org/2001/08/14/dces#title maps to a TitleM field, in the collection for Gallery B the same RDF URI maps a Caption field.

I was imaging something similar could be done for SRW if the CQL specification allowed
	IndexQualifier: [IndexSet.] IndexID | rdfURI

A query could then be specified as either 

dc.creator = "Constable"
or
http://dublincore.org/2001/08/14/dces#title = "Constable"

Another example using the published Bib-1 schema:
Contributor = "Montovani, Alberti"
or
http://www.gils.net/z-tokens.rdfs#21 = "Montovani, Alberti"
By the way, is anyone going to be attending the WWW2002 conference at the beginning of May? I wasn't able to attend the recent ZIG meeting but I am going to Waikiki (!)  and would appreciate the chance to talk about SRW with anyone who is there.
Cheers
Alison





> 
> > We have had also had to give thought to specifying queries 
> and returning
> > records which consist of more that simple text - in ARTISTE 
> every record
> > consists of an image and related metadata and queries may consist of
> > only an image, only metadata, or a combination of a image 
> and metadata.
> 
> That, as Mike has just said, is one of the tradeoffs. You 
> can't do that
> using SRW as SRW only works in strings. And until it becomes SSSESRW
> (Search, Scan, Sort, Extended Services, Retrieve Webservice) there's a
> whole lot more you can't do too. Such as sorting by date or 
> finding lists 
> of artists.
> 
> For sophisticated IR, you still need Z39.50 and will continue 
> to do so 
> until SRW has put back in the complexity it's currently missing.
> 
> For small projects that have no need of the full scope of 
> Z39.50, SRW is
> (will be) really useful. But your project certainly doesn't 
> seem to be one 
> of them. 
> 
> UK Academic projects of note are JAFER (Matthew Dovey at Oxford) and
> Cheshire (Me, Liverpool in conjunction with UCB) I suspect 
> that JAFER is
> more suited to your needs though as it's Java based, but 
> Cheshire would
> certainly be useful as well.
> 
> Rob
> 
> -- 
>       ,'/:.          Rob Sanderson (azaroth@liverpool.ac.uk)
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I L L U M I N A T I

Received on Friday, 26 April 2002 12:18:08 UTC