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Move data between graphs

From: Kjetil Kjernsmo <Kjetil.Kjernsmo@computas.com>
Date: Mon, 25 May 2009 11:13:25 +0200
To: SPARQL Working Group <public-rdf-dawg@w3.org>
Message-Id: <200905251113.25420.Kjetil.Kjernsmo@computas.com>
All,

We had a brief discussion about the use cases of moving data between graphs on 
the F2F, if there were any... I had the feeling we did something like that, 
so I asked my colleague Magnus, who showed me a query that did. There is a 
case in our code where we import data in a temporary graph, then move triples 
to a "permanent home" once the final graph name is known.

The query is somewhat nasty, this is an example:

INSERT INTO GRAPH <http://msone.computas.no/graphs/instance/dummy1>
{
  ?s ?p ?o .
  ?s ?p3 ?o1 .
  ?s1 ?p1 ?s .
  ?o ?p2 ?o2 .
  ?s <http://xmlns.computas.com/sublima#importDate> """20-04-2009""" .
  ?s1 <http://xmlns.computas.com/sublima#importDate> """20-04-2009""" .
  ?o <http://xmlns.computas.com/sublima#importDate> """20-04-2009""" .
}
WHERE
{ 
  GRAPH  <http://msone.computas.no/graphs/temp/dummy1>
  {
    ?s ?p ?o .
    OPTIONAL {?s1 ?p1 ?s}
    OPTIONAL {?o ?p2 ?o2}
    OPTIONAL {?s ?p3 ?o1}
    FILTER (?s in (
      <file:/c:/tmp/mp3/Mediesone.wmv>))
  }
}

This is just to say "yes, there is a use case for moving data between graphs".


Kind regards 

Kjetil Kjernsmo
-- 
Senior Knowledge Engineer
Mobile: +47 986 48 234
Email: kjetil.kjernsmo@computas.com   
Web: http://www.computas.com/

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Received on Monday, 25 May 2009 09:14:52 GMT

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