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minimim cardinality of REDUCED solution sets

From: Arjohn Kampman <arjohn.kampman@aduna-software.com>
Date: Tue, 03 Jul 2007 16:11:35 +0200
Message-ID: <468A5917.1070903@aduna-software.com>
To: public-rdf-dawg-comments@w3.org

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 Kampman, Senior Software Engineer
Aduna - Guided Exploration
Received on Tuesday, 3 July 2007 15:18:27 UTC

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