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RE: Implement decision on bNodelabel/INSERT DATA operations.

From: Polleres, Axel <axel.polleres@siemens.com>
Date: Wed, 3 Oct 2012 16:22:26 +0200
To: "andy.seaborne@epimorphics.com" <andy.seaborne@epimorphics.com>, "public-rdf-dawg@w3.org" <public-rdf-dawg@w3.org>
CC: "Polleres, Axel" <axel.polleres@siemens.com>
Message-ID: <9DA51FFE5E84464082D7A089342DEEE80149E378B978@ATVIES9917WMSX.ww300.siemens.net>
I am sorry to bother again, but after re-reaging, I still have a question regarding our resolution:

"
The same blank node label can not be used in:

*two basic graph patterns in a SPARQL Query
*two WHERE clauses of SPARQL Update operations
*two INSERT DATA SPARQL Update operations
Note that the same blank node label can occur in different QuadPattern clauses in a SPARQL Update request.
"

According to my reading of
 http://www.w3.org/2009/sparql/meeting/2012-10-02#resolution_3
and my understanding of what was said in the Telco,
also the reuse across INSERT clauses (without data) needs to be prohibited,
which this wording doesn't exclude.


Thus, I amend the proposed changes posted before as follows:

1)

 -          <li>two <code><a href="#rInsertData">INSERT DATA</a></code>
 -          SPARQL Update operations</li>
 +          <li>two <code><a href="#rInsertClause">INSERT</a> or <code><a href="#rInsertData">INSERT DATA</a></code>
 +          clauses in a <a href="http://www.w3.org/TR/sparql11-update/">SPARQL Update</a> request</li>
          </ul>

2)

-         <p>Note that the same blank node label can occur in different
-         <a href="#rQuadPattern">QuadPattern</a> clauses
-         in a <a href="http://www.w3.org/TR/sparql11-update/">SPARQL Update</a>
-        request.</p>
+         <p>Note that the same blank node label can occur in different
+         <a href="#rQuads">Quads</a>
+         within the same <a href="#rQuadPattern">QuadPattern</a> or <a href="#rQuadData">QuadData</a>
+       clause in a <a href="http://www.w3.org/TR/sparql11-update/">SPARQL Update</a>
+       request.</p>


Best,
Axel


> -----Original Message-----
> From: Polleres, Axel
> Sent: Mittwoch, 03. Oktober 2012 15:47
> To: 'andy.seaborne@epimorphics.com'; 'public-rdf-dawg@w3.org'
> Subject: RE: Implement decision on bNodelabel/INSERT DATA operations.
>
> Hi Andy, all,
>
> If I see it correctly, the anchor is
>  http://www.w3.org/2009/sparql/docs/query-1.1/rq25.xml#grammarBNodes
> instead of
> http://www.w3.org/2009/sparql/docs/query-1.1/rq25.xml#grammarB
> NodeLabels
> (nitpicking, it's anyways correct in the doc)
>
>
> As for the new text... Some minor correction suggestions inline below:
> --------------------------------------------------------------
> -----------
>         </div2>
>         <div2 id="grammarBNodes">
>           <head>Blank Nodes and Blank Node Labels</head>
>
> -       <p>The blank nodes can not used in:</p>
> +       <p>Blank nodes can not used in:</p>
>         <ul>
>           <li><code><a href="#rDeleteWhere">DELETE
> WHERE</a></code></li>
>           <li><code><a href="#rDeleteWhere">DELETE
> DATA</a></code></li>
>           <li>a <code><a
> href="#rDeleteClause">DeleteClause</a></code></li>
>         </ul>
> +       <p>in a <a
> href="http://www.w3.org/TR/sparql11-update/">SPARQL
> + Update</a> request.</p>
>
>         <p>Blank node labels are scoped to the
>         <a href="#defn_SPARQLRequestString">SPARQL Request String</a>
>         in which they occur. Different uses of the same blank
> node label in a
>         request string refer to the same blank node. Fresh
> blank nodes are generated for
>         each request; blank nodes can not be referenced by
> label across requests.
>         </p>
>
>         <p>The same blank node label can not be used in:</p>
>         <ul>
>           <li>two basic graph patterns in a SPARQL Query</li>
> -         <li>two <code><a href="#rModify">WHERE</a></code> clauses
> -         of SPARQL Update operations</li>
> +         <li>two <code><a href="#rModify">WHERE</a></code> clauses
> +         in a <a href="http://www.w3.org/TR/sparql11-update/">SPARQL
> +Update</a> request</li>
> -         <li>two <code><a href="#rInsertData">INSERT DATA</a></code>
> -         SPARQL Update operations</li>
> +         <li>two <code><a href="#rInsertData">INSERT DATA</a></code>
> +         clauses in a <a
> +href="http://www.w3.org/TR/sparql11-update/">SPARQL Update</a>
> +request</li>
>         </ul>
>
>         <p>Note that the same blank node label can occur in different
>         <a href="#rQuadPattern">QuadPattern</a> clauses
>         in a <a
> href="http://www.w3.org/TR/sparql11-update/">SPARQL
> Update</a> request.
>         </p>
>
>         </div2>
> --------------------------------------------------------------
> -----------
>
> With those minor changes, I'm fine with the new text
> (completing ACTION-692).
> Changes within Update to follow next (separate mail)
>
> Thanks & best regards,
> Axel
>
>
> > -----Original Message-----
> > From: Andy Seaborne [mailto:andy.seaborne@epimorphics.com]
> > Sent: Dienstag, 02. Oktober 2012 21:24
> > To: SPARQL Working Group
> > Subject: Implement decision on bNodelabel/INSERT DATA operations.
> >
> > ACTION-691 completed
> >
> > == Changes to rq25
> >
> > Section "19.6 Blank Node Labels"
> > http://www.w3.org/2009/sparql/docs/query-1.1/rq25.xml#grammarB
> > NodeLabels
> >
> > This also consolidated grammar notes 9 and 10 in to 19.6.
> >
> > (NB: the allowed reuse in different QuadPattern is not visible:
> > each individual template is subject to instantiation before
> any blank
> > nodes get in to the data.)
> >
> > To minimise change:
> >
> > Grammar note 9 left as-is.
> > Grammar note 10 now just a textual mention of 19.6
> >    (so numbering of notes has not changed)
> >
> > == No grammar rule changes
> >
> > == Tests
> >
> > syntax-update-53.ru is correct (no need to remove it or to
> unapprove
> > it).
> >
> > I have added a negative test (not approved): syntax-update-54.ru
> >
> > ------
> > PREFIX : <http://www.example.org/>
> >
> > INSERT DATA { _:b1 :p :o }
> > ;
> > INSERT DATA { _:b1 :p :o }
> > ------
> >
> >     Andy
> >
> >
>
Received on Wednesday, 3 October 2012 14:23:02 GMT

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