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Re: On the inevitability of SPARQL/SPIN for SHAQL

From: Holger Knublauch <holger@topquadrant.com>
Date: Tue, 03 Mar 2015 15:11:18 +1000
Message-ID: <54F54276.5010306@topquadrant.com>
To: RDF Data Shapes Working Group <public-data-shapes-wg@w3.org>
On 3/3/2015 14:59, Jose Emilio Labra Gayo wrote:
>     Why should this group take on such undertaking instead of reusing
>     already existing language produced by W3C?
> Because "SPARQL queries cannot easily be inspected and understood, 
> either by human beings or by machines, to uncover the constraints that 
> are to be respected". [1]

Jose, the sentence following your excerpt above is

"The term 'shape' emerged as a popular label for these constraints."

I believe this clarifies that the group was not contrasting SPARQL with 
something like XPath, but rather SPARQL versus the high-level vocabulary 
of sh:minCount and sh:valueType. A new language such as a 
yet-to-be-defined variant of XPath or a yet-to-be-defined subset of 
SPARQL's FILTER expressions would arguably have the same basic 
characteristics as SPARQL itself.

Received on Tuesday, 3 March 2015 05:12:19 UTC

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