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Re: perhaps now is the time to address issues#accessingCollections? [Fwd: Re: an extension to SPARQL]

From: Lee Feigenbaum <feigenbl@us.ibm.com>
Date: Mon, 8 Jan 2007 14:38:53 -0500
To: Dan Connolly <connolly@w3.org>, RDF Data Access Working Group <public-rdf-dawg@w3.org>
Message-ID: <OF91403E96.A51E8387-ON8525725D.006BC6C9-8525725D.006BEC67@us.ibm.com>

Dan Connolly wrote on 01/08/2007 02:10:40 PM:

> The attached comment is new information on issues#accessingCollections .
> 
> It seems to me that the algebraic approach to specifying SPARQL
> might making this sort of thing fairly straightforward; i.e.
> the situation looks different to me than it did in Feb 2005
> when we resolved to postpone.
> 
> Does anybody else think it's worth taking another look at this now?

It's on this week's agenda, so we'll at least get a feel for how people 
feel about the costs and benefits of taking up accessingCollections as a 
new feature at this point.

Lee



> -- 
> Dan Connolly, W3C http://www.w3.org/People/Connolly/
> D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
> 
> ----- Message from Dan Connolly <connolly@w3.org> on Thu, 04 Jan 
> 2007 10:09:08 -0600 -----
> 
> To:
> 
> Faisal.Alkhateeb@inrialpes.fr
> 
> cc:
> 
> public-rdf-dawg-comments@w3.org, Jerome Euzenat <Jerome.
> Euzenat@inrialpes.fr>, Jean-François Baget 
<jean-francois.baget@inrialpes.fr>
> 
> Subject:
> 
> Re: an extension to SPARQL
> 
> On Thu, 2007-01-04 at 16:41 +0100, Faisal.Alkhateeb@inrialpes.fr wrote:
> > 
> > Dear members of the DAWG,
> > 
> > First, I would like to wish you a happy new year 2007.
> 
> Likewise.
> 
> > Over the last few months, we did some investigation on an extension to
> > SPARQL (i.e., SPARQL + regular expressions in the predicate position 
of
> > the graph patterns).
> 
> Interesting.
> 
> It looks closely related to the WG discussion of issue
> accessingCollections:
> 
> "Support for collections/containers? or trees? or path regular
> expressions?"
> http://www.w3.org/2001/sw/DataAccess/issues#accessingCollections
> 
> In Feb 2005, the WG...
> 
> "RESOLVED: to postpone accessingCollections because 
>       * our not standardizing it doesn't stop anybody from playing
>       * none of the extant designs seems sufficiently mature"
> 
> We do get comments on the idea from time to time. From the issues
> list, you can see that one comment in Nov 2005 provoked Andy Seaborne
> to do just a bit of design noodling, but not enough to re-open
> the issue.
> 
> Your paper provides new information with respect to whether
> the extant designs are sufficiently mature. I'll see that
> it gets linked from the issues list.
> 
> 
> 
> 
> > The results are written down in the following paper which we
> > hope contains some useful results:
> > 
> > http://barbara.inrialpes.fr/exmo/people/alkhateeb/papers/PSPARQL.pdf
> > 
> > We are also interested to provide an implementation to this extension 
in
> > Java, so you can find in the following site an applet that, which 
presents
> > what we did until now in the implementation and in the experiments of 
this
> > experiments, you can test it in the fragement implemented until now:
> > 
> > http://psparql.inrialpes.fr/
> > 
> > The work is continue in developing this extension, so feel free to 
send
> > any comments if for example there are bugs, etc.
> > 
> > 
> > Best regards,
> > 
> > 
> -- 
> Dan Connolly, W3C http://www.w3.org/People/Connolly/
> D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
Received on Monday, 8 January 2007 19:39:10 GMT

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