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Re: saddle?

From: Eric Prud'hommeaux <eric@w3.org>
Date: Sun, 28 May 2006 18:12:56 +0200
To: "Seaborne, Andy" <andy.seaborne@hp.com>
Cc: Kendall Clark <kendall@monkeyfist.com>, dawg mailing list <public-rdf-dawg@w3.org>
Message-ID: <20060528161256.GC9337@unagi.w3.org>

On Tue, May 16, 2006 at 05:00:52PM +0100, Seaborne, Andy wrote:
> 
> 
> 
> Kendall Clark wrote:
> >
> >Folks,
> >
> >I've had two separate queries in the past few days about SADDLE. So, I 
> >have two questions:
> >
> >1. does anyone have a copy of any of that work? I fear it only exists in 
> >CVS somewhere, as an old revision of the editor's draft of the protocol 
> >spec. I'll be trawling through that looking for bits, but if someone has 
> >something else ready-to-hand, that would be great.
> >
> >As I recall the majority of the work done on this was done at the Boston 
> >F2F. Maybe someone has some notes from that?
> >
> >2. is there any interest in restarting work on SADDLE sooner rather than 
> >later, on the assumption that 2 recent queries probably may be the tip 
> >of an iceberg -- okay, probably not iceberg, but if 2 people asked, I 
> >assume lots of other people wondered and didn't ask.
> >
> >Cheers,
> >Kendall
> 
> A couple of data points:
> 
> http://esw.w3.org/topic/SparqlEndpointDescription
> 
> and there is a student (Bastian Quilitz) here working on the problem from 
> the point of view of information needed to federate queries.  That work 

indulgent question:

Does that involve some sort of Query Pattern patterns?  If I go to
IMDB to resolve queries with certain predicates:,

{ ?m imdb:name ?movieName .
  ?m imdb:star ?starName }

they will only answer if one of those is constrained:.

  [
    wsdl:endpoint <imdb> ;
    saddle:answers [
	saddle:pattern "{ ?m imdb:name ?movieName .
                          ?m imdb:star ?starName }" ;
        saddle:mustBeConstrained (?movieName) ] ;
    saddle:answers [
	saddle:pattern "{ ?m imdb:name ?movieName .
                          ?m imdb:star ?starName }" ;
        saddle:mustBeConstrained (?starName) ] ;
  ]

I've been curious about this for a bit so I'm wondering if Basian is
solving this sort of problem. (Also, I had to see if my mail probs
were fixed, and this mail is pretty non-critical.)

> looks promising although it's evolving nature may also be a sign that the 
> problem space is not completely scoped out yet.  Problem definition woudl 
> seem to be a possible next step (XG? IG? ad hoc on the ESW wiki?)
> 
> 	Andy
> 
Received on Sunday, 28 May 2006 16:11:19 GMT

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