+1 Sounds good to me.
On 3/16/06, Elias Torres <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > [Forgive me for the double-send, but I don't think it went through the > first time] > > Roller Team, > > As you might already know I'm involved with W3C working group for SPARQL > [1]. I met there Henry Story from Sun who is working on an OWL Ontology > for Atom [2]. He is very interested in seeing his work made an > specification, but before we support him on that endeavor I would like > to test it first. An idea we had with Dan Connolly was to add a SPARQL > endpoint to Roller and use Henry's ontology to model queries against the > Roller database. > > Here's an example query: (return title and summary for all entries > written by John Doe). > > PREFIX atom: <http://www.w3.org/2005/10/23/Atom#> > SELECT ?title ?summary > WHERE { > ?feed atom:entry ?entry ; > atom:author [ atom:name "John Doe" ]. > ?entry atom:title [ atom:value ?title ] ; > atom:summary [ atom:value ?summary ] . > } LIMIT 20 > > For data that looks like this: > > [] a :Feed, :Version; > :title [ :value "Example Feed"; > :type "text/plain" ]; > :link [ :href <http://example.org/>; > :rel iana:alternate ]; > :updated "2003-12-13T18:30:02Z"^^xsd:dateTime; > :author [ :name "John Doe" ]; > :id <urn:uuid:60a76c80-d399-11d9-b93C-0003939e0af6>; > :entry [ a :Entry, :Version; > :title [ :value "Atom-Powered Robots Run Amok"; > :type "text/plain" ]; > :link [ :href <http://example.org/2003/12/13/atom03.html>; > :rel iana:alternate ]; > :id <urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a>; > :updated "2003-12-13T18:30:02Z"^^xsd:dateTime; > :summary [ :value "some text"; > :type "text/plain" ] > ] . > > More examples [6] > > SPARQL defines a protocol [3] that allows GET requests to be submitted > with queries. And it just gets better, I have spec'd out a JSON output > for the SPARQL results [4]. This means that we could have a very open > way to query the Roller database and output JSON for Web 2.0 > applications. I can do all of this without making a single change to the > Roller code or database, except for adding a servlet and a few jars > (jena) [5]. Jena is BSD license (is that ok for Apache projects). It > would be very interesting to test both the Atom+OWL and the SPARQL query > language on a very popular dataset (JRoller, blogs.sun, etc). I can do > this in the sandbox at first, but unless the /roller/sparql is being > hit, it should not be a big deal to the Roller codebase. However, I > wanted to get a feel for your thoughts on this one. > > - -Elias > > [1] http://www.w3.org/2001/sw/DataAccess/ > [2] http://pragmatron.org/trac/file/pragmatron/atom-owl/AtomOwl.n3 > [3] http://www.w3.org/2001/sw/DataAccess/proto-wd/ > [4] http://www.mindswap.org/~kendall/sparql-results-json/ > [5] http://jena.sourceforge.net/ > [6] http://www.intertwingly.net/wiki/pie/PaceSparqlLink > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (GNU/Linux) > > iD8DBQFEGaM8tsNTCOFcV0oRAgmWAJ4gjQXxl1PbKfqx36Yi/zrQH3TBogCfV+B0 > fo0DT1Dq0uUCdYeneBvFlG4= > =ZITo > -----END PGP SIGNATURE----- >
