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Comments response for Michael Schneider

From: Birte Glimm <birte.glimm@uni-ulm.de>
Date: Tue, 6 Sep 2011 19:29:08 +0200
Message-ID: <CABt65OdCiKyLPRJDe5PJ_z0uZnkc6Z9tP9mvU_2Aw5z42J75RQ@mail.gmail.com>
To: SPARQL Working Group <public-rdf-dawg@w3.org>
Hi all,

I started drafting the responses to Michael Schneider's comments, see:


I need some input for MS-4
Michael suggests to either not define the error handling or rather use
SHOULD instead of must for the case of syntactically invalid input.
Furthermore, he suggest to remove the extra part for the OWL Direct
Semantics regime:
If the queried ontology is not an OWL 2 DL ontology or the query is
not legal for the ontology, the system MAY refuse the query and raise
a QueryRequestRefused error or the system MAY use only a subset of the
triples in the ontology or query.
In particular he argues that working only on a subset of the triples
can lead to irritating results. I agree with that and wonder why we
added this in the first place.
Thus, I suggest to remove that part.

I believe that we added the error handling in order to make clear what
kind of error from the protocol have to be used and removing the error
handling might not be helpful. On the other hand SPQRL Query does not
define the concrete types of error, so I wonder why that was required
for the ent. regimes. Anybody recalls that?

In general I am fine with rejecting syntactically invalid input since
parsers struggle anyway with non-grammar conformant input.

I haven't yet started with MS-5, MS-6, and MS-7, but hope to get to that soon..


Jun. Prof. Dr. Birte Glimm                         Tel.:    +49 731 50 24125
Inst. of Artificial Intelligence                      Secr:  +49 731 50 24258
University of Ulm                                       Fax:   +49 731 50 24188
D-89069 Ulm                                             birte.glimm@uni-ulm.de
Received on Tuesday, 6 September 2011 17:29:39 UTC

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