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Re: minimim cardinality of REDUCED solution sets

From: Seaborne, Andy <andy.seaborne@hp.com>
Date: Sun, 08 Jul 2007 18:59:14 +0100
Message-ID: <469125F2.3040209@hp.com>
To: Arjohn Kampman <arjohn.kampman@aduna-software.com>
Cc: public-rdf-dawg-comments@w3.org



Arjohn Kampman wrote:
> 
> The current SPARQL spec (Candidate Recommendation, 14 June 2007) states
> in section 9.3.2:
> 
>   "The cardinality of any set of variable bindings in an REDUCED
>   solution set is at least one and not more than the cardinality of the
>   solution set with no DISTINCT or REDUCED modifier."
> 
> The "at least one" statement doesn't correct to me. Queries that don't
> yield any results without DISTINCT or REDUCED modifier also return zero
> results with one of these modifiers, right?
> 
> The "at least one" part should probably be removed, or replaced with
> something that states that it is equal to or larger than the DISTINT
> solution set.

Arjohn,

Thank you for your comment.  It does make better sense to say it's between the 
cardinality with DISTINCT and no modifier at all.

	Andy


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Received on Sunday, 8 July 2007 17:59:30 GMT

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