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Re: [TF-PP] Possible starting points

From: Alexandre Passant <alexandre.passant@deri.org>
Date: Tue, 29 Sep 2009 14:45:13 +0100
Cc: SPARQL Working Group <public-rdf-dawg@w3.org>
Message-Id: <89354C09-9C5B-40D7-966E-54248F1797E4@deri.org>
To: "Seaborne, Andy" <andy.seaborne@hp.com>

On 29 Sep 2009, at 12:12, Seaborne, Andy wrote:

> This is a request for your views on starting points for the property  
> paths time permitting feature.
>
> Please send +1/0/-1 for the options (which aren't meant to be  
> mutually exclusive) or we might get telcon time.
>
> I've tried to list the main possibilities in terms of styles and  
> approach as starting points: all have variations and areas of  
> uncertainty (e.g. ordering of results).
>
> 1/ Property paths only mention IRIs or prefixed names.
>
> The most conservative choice. Still need to relate to entailment.
>

+1

> 2/ Property paths with variables and IRIs or prefixed names.
> (issues include restriction of what can be asked a la ?p* discussion)
>

-1

> 3/ With access to the length of the path matched
> Issues include how multiple paths between two nodes are handled (two  
> lengths possible).
>

+1

> 4/ With access to the path matched (path-valued variables is one  
> possibility)
> Issues as 3 + what is a path value "datatype".
>

0

> For all of them: add an option to have
>
> 5/ A mechanism that will allow a variety of path matching schemes,  
> and provide one such system.
> Roughly, this would involve defining syntax so various different  
> approaches can at least use common syntax but choose from 1-4 as to  
> what the WG describes in this round of standardization and show the  
> relationship to the syntax. E.g having a PATH keyword idea in [1].

+1

>
> Then
>
> 6/ Do nothing in this round - too early to standardise.

-1

Best,

Alex.

>
> 	Andy
>
>
> http://www.w3.org/2009/sparql/wiki/TaskForce:PropertyPaths
> http://www.w3.org/2009/sparql/wiki/Feature:PropertyPaths
>
> [1] http://lists.w3.org/Archives/Public/public-rdf-dawg/2009JulSep/0315.html
>
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--
Dr. Alexandre Passant
Digital Enterprise Research Institute
National University of Ireland, Galway
:me owl:sameAs <http://apassant.net/alex> .
Received on Tuesday, 29 September 2009 13:45:57 GMT

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