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Clarification on blank nodes in DELETE templates.

From: Andy Seaborne <andy.seaborne@talis.com>
Date: Thu, 29 Apr 2010 22:05:56 +0100
Message-ID: <4BD9F4B4.8070405@talis.com>
To: SPARQL Working Group <public-rdf-dawg@w3.org>
http://www.w3.org/2009/sparql/meeting/2010-03-09#resolution_2

[[
RESOLVED: Blank nodes in DELETE templates act as "wild cards", 
effectively as variables bound to all RDF terms; the same blank node 
cannot be used in the WHERE clause and the template, or in multiple 
BGPs, SteveH, dcharbon2, LeeF abstaining
]]


DELETE templates include the form GRAPH ?? { ... } and my question is 
about the ??

Do we allow

DELETE WHERE { GRAPH [] { ?s ?p ?o } }
DELETE WHERE { GRAPH _:a { ?s ?p ?o } }
DELETE { GRAPH [] { ?s ?p ?o } } WHERE { ?s ?p ?o }

(although by scoping _:a can't ever be the same as another _:a?)

	Andy
Received on Thursday, 29 April 2010 21:06:31 GMT

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