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RE: TriQL

From: Jeremy Carroll <jjc@hplb.hpl.hp.com>
Date: Mon, 23 Feb 2004 16:00:14 +0100
To: "Chris Bizer" <bizer@gmx.de>, "Jeremy Carroll" <jjc@hplb.hpl.hp.com>
Cc: <www-archive@w3.org>
Message-ID: <BHEGLCKMOHGLGNOKPGHDEEKPCCAA.jjc@hpl.hp.com>


I like that - I will forward this to Pat and Patrick ...

Jeremy

> -----Original Message-----
> From: Chris Bizer [mailto:bizer@gmx.de]
> Sent: 23 February 2004 15:48
> To: Jeremy Carroll
> Cc: www-archive@w3.org
> Subject: TriQL
> 
> 
> Hi Jeremy,
> 
> a side comment and not our main topic now, but I have been 
> thinking a little
> bit more about the query language. Maybe I should change the 
> syntax and move
> the query patterns from statement level to graph level and closer to the
> TriG syntax. 
> 
> Example: Select all persons which have been borne before 1970, using only
> statements from authors I trust.
> 
> SELECT ?y
> WHERE
>     ?x (?y rdf:type ex:Person .
>          ?y ex:birthyear ?z)
>     null (?x saidby ?a)
>     null (ex:Me trusts ?a)
> AND ?z < "1970"
> 
> and allow the abbreviation of graph names - as you proposed - if 
> they don't
> matter, like in the following version of the query
> 
> SELECT ?y
> WHERE
>     ?x (?y rdf:type ex:Person .
>          ?y ex:birthyear ?z)
>     (?x saidby ?a)
>     (ex:Me trusts ?a)
> AND ?z < "1970"
> 
> Both only syntactical changes but the queries look more like named graphs
> :-)
> 
> Chris
>  
> 
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Received on Monday, 23 February 2004 10:01:40 GMT

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