Re: Dataset Semantics

On 09/20/2012 10:48 AM, Pat Hayes wrote:
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> Suppose we simply say that {G, N} ds-entails {G' N'} exactly when: G entails G' and for all <n, g'> in N' there is a <n, g> in N with g entails g'. (Same n, note.) This covers the three conditions above, and it does not imply ds-entailment simply from inconsistency of the default graph alone.  (This relies on the idea that a missing graph is understood to be the empty graph, but I think we all assume this, right?)
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> This kind of finesses the task of giving a model theory for datasets, so its not exactly a dataset semantics, but it might be enough for our purposes. It is monotonic in the usual senses, eg adding graphs to a dataset does not block any entailments. We could describe it as a constraint on any stronger (and genuine model-theoretic) semantics.
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> Comments?
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> Pat
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Sounds rather familiar.

http://lists.w3.org/Archives/Public/public-rdf-wg/2012Sep/0151.html

peter

Received on Thursday, 20 September 2012 15:01:59 UTC