- From: Alan Ruttenberg <alanruttenberg@gmail.com>
- Date: Thu, 17 May 2007 09:15:43 -0400
- To: Eric Jain <Eric.Jain@isb-sib.ch>
- Cc: Chris Mungall <cjm@fruitfly.org>, public-semweb-lifesci <public-semweb-lifesci@w3.org>
Nice idea for syntax.
Jonathan and I will be working on some sort of macro syntax for
SPARQL, which would make this and a lot of other queries be a lot
nicer to write.
The Virtuoso folks are willing to implement a prototype. If it works
out then perhaps it can be proposed for SPARQL 2.
More news about it when we have something, hopefully in the next
couple of months...
-Alan
On May 17, 2007, at 9:05 AM, Eric Jain wrote:
> Alan Ruttenberg wrote:
> > prefix dc: <http://purl.org/dc/elements/1.1/>
> > prefix sc: <http://purl.org/science/owl/sciencecommons/>
> > select ?s ?p ?o ?by
> > from <http://purl.org/commons/hcls/proto>
> > where
> > { ?s ?p ?o.
> > ?statement rdf:type rdf:Statement.
> > ?statement rdf:subject ?s.
> > ?statement rdf:predicate ?p.
> > ?statement rdf:object ?o.
> > ?statement dc:creator ?by
> > }
>
> That's precisely what I'm talking about :-) Now imagine a query
> that's already complicated to start with, even without any
> reification...
>
> If reification was directly supported, you'd expect something like
> this:
>
> prefix dc: <http://purl.org/dc/elements/1.1/>
> prefix sc: <http://purl.org/science/owl/sciencecommons/>
> select ?s ?p ?o ?by
> from <http://purl.org/commons/hcls/proto>
> where { ?s ?p ?o [ dc:creator ?by ] }
Received on Thursday, 17 May 2007 13:21:48 UTC