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Re: Aggregate extensibility

From: Andy Seaborne <andy.seaborne@talis.com>
Date: Tue, 30 Mar 2010 16:52:13 +0100
Message-ID: <4BB21E2D.3020906@talis.com>
To: Ivan Mikhailov <imikhailov@openlinksw.com>
CC: Axel Polleres <axel.polleres@deri.org>, Orri Erling <erling@xs4all.nl>, SPARQL Working Group <public-rdf-dawg@w3.org>


On 30/03/2010 3:26 PM, Ivan Mikhailov wrote:
> Hello Axel,
...

>> Would we also allow aggregates with arityy different to 1 (like common in functions) e.g. agg-uri(?X ?Y)
>
> That's absolutely required for statistical calculations of all sorts,
> from regression to likelihood detection.
 >
 > Best Regards,
 >
 > Ivan.

At F2F3, we decided to not restrict the arity to 1 for custom aggregates 
(and they can have parameters to the aggregator as well as arguments to 
aggregate over).

	Andy
Received on Tuesday, 30 March 2010 15:52:46 GMT

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