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Re: question about ShEx values

From: Eric Prud'hommeaux <eric@w3.org>
Date: Sat, 19 Jul 2014 10:24:05 -0400
To: Olivier Rossel <olivier.rossel@gmail.com>
Cc: "Peter F. Patel-Schneider" <pfpschneider@gmail.com>, Jose Emilio Labra Gayo <jelabra@gmail.com>, "public-rdf-shapes@w3.org" <public-rdf-shapes@w3.org>
Message-ID: <20140719142404.GC23532@w3.org>
* Olivier Rossel <olivier.rossel@gmail.com> [2014-07-19 09:07+0200]
> What SPARQL is Peter's example supposed to compile into?

http://tinyurl.com/ky5kbuj gives
[[
PREFIX ex:<http://ex.example/#>
ASK {
    { SELECT ?0 (COUNT(*) AS ?0_c0) {
      ?0 ex:bar1 ?o .
    } GROUP BY ?0 HAVING (COUNT(*)<=1)}
    { SELECT ?0 (COUNT(*) AS ?0_c1) {
      ?0 ex:bar1 ?o . FILTER ((?o = ex:val1))
    } GROUP BY ?0 HAVING (COUNT(*)<=1)}
    FILTER (?0_c0 = ?0_c1)
}
]]
which means that the count of triples matching any ?o must match those that have the value ex:val1.


> Envoyé de mon iPhone
> 
> > Le 18 juil. 2014 à 14:49, "Peter F. Patel-Schneider" <pfpschneider@gmail.com> a écrit :
> > 
> > That seems truly bizarre.
> > 
> > Does anyone know whether this is a desired behaviour?
> > 
> > peter
> > 
> > 
> >> On 07/18/2014 04:28 AM, Jose Emilio Labra Gayo wrote:
> >> Yes. it is.
> >> 
> >> I checked it here: http://goo.gl/s5kevB
> >> 
> >> Best regards, Jose Labra
> >> 
> >> 
> >> On Fri, Jul 18, 2014 at 11:33 AM, Peter F. Patel-Schneider
> >> <pfpschneider@gmail.com <mailto:pfpschneider@gmail.com>> wrote:
> >> 
> >>    I've been trying to dig through the ShEx definition.
> >> 
> >>    It appears to me that for
> >> 
> >>    <foo>
> >>    { ex:bar1 (ex:val1) ? }
> >> 
> >>    with graph
> >> 
> >>    ex:a ex:bar1 ex:val1 .
> >>    ex:b ex:bar1 ex:val2 .
> >> 
> >>    that ex:a matches <foo> but that ex:b does not.
> >> 
> >>    Is this correct?
> >> 
> >>    peter
> >> 
> >> 
> >> 
> >> 
> >> 
> >> --
> >> Saludos, Labra
> > 
> 

-- 
-ericP

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