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Re: 404 Re: Comments on the Triple Patterns Fragments draft

From: Olaf Hartig <ohartig@uwaterloo.ca>
Date: Wed, 30 Jul 2014 09:55:21 -0400
To: <public-hydra@w3.org>
Message-ID: <2411324.V5ksXjSDXr@porty2>
Hi Ruben,

On Wednesday 30 July 2014 15:19:39 Ruben Verborgh wrote:
> Hi Erik,
> 
> > client: "give me the set of things matching this pattern."
> > server: "here is the set you asked for. it happens to be empty."
> 
> Yes, that's indeed the other possible interpretation.

Having a DB background, I would also consider Erik's interpretation the most 
natural. In fact, that's how we formalized LDFs in our ISWC paper: For any TPF 
whose selector does not match any triple in the underlying RDF graph, the set 
\Gamma is empty. Nonetheless, it's an ordinary TPF.

Olaf
Received on Wednesday, 30 July 2014 13:56:24 UTC

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