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Re: Agenda SPARQL TC 2009-01-05

From: Birte Glimm <birte.glimm@comlab.ox.ac.uk>
Date: Mon, 4 Jan 2010 15:00:15 +0000
Message-ID: <492f2b0b1001040700p7541bd49i6c91ea6ec1a319a1@mail.gmail.com>
To: Axel Polleres <axel.polleres@deri.org>, Andy Seaborne <andy.seaborne@talis.com>
Cc: SPARQL Working Group <public-rdf-dawg@w3.org>
Axel,
if there is some time in tomorrow's telecon, I would like to discuss
whether it is possible to clarify the definition of Pattern Instance
Mapping in Query 1.1.

The Query 1.0 definition says:
A Pattern Instance Mapping, P, is the combination of an RDF instance
mapping, σ, and solution mapping, μ. P(x) = μ(σ(x))

The problem is that it is never said what x is and readers have to
guess that it is a BGP. Even if they guess that x is a BGP, then it is
still the case that sigma and mu are only defined for blank nodes and
variables as input, so readers again have to guess that in this case
it is meant that the blank nodes and variables in the BGP x are
replaced with the values given by mu and sigma.

Query 1.1 uses the Query 1.0 definition and adds a sentence below to
clarify this, but I would prefer to actually extend the definition
accordingly if the WG is not opposed to that. IMO, the definition
leaves a lot for readers to figure out themselves and it is quite an
essential definition. Such a change would not change the meaning of
the definition, but extend it so that it is clear what is meant.

Birte


2010/1/4 Axel Polleres <axel.polleres@deri.org>:
> Dear all,
>
> first of all, Happy 2010 and looking fwd to welcome you to our first TC this year!
> On Tuesday, we obviously want to check the status of the reviews and go through them as far
> as there are any critical comments. We should also check the schedule in case there are reviews
> missing still, since we want to make a decision to publish (based on reviews & subsequent
> updates made by editors) in two weeks at the latest.
>
> In case we still have time left with all that on Tuesday (given the speed we rushed through all
> docs in the last TC before christmas, you never know), I'd like to have a look over the
> update ISSUEs mentioned in Paul's and Andy's mails [1,2].
>
> 1. http://lists.w3.org/Archives/Public/public-rdf-dawg/2009OctDec/0628.html
> 2. http://lists.w3.org/Archives/Public/public-rdf-dawg/2009OctDec/0674.html),
>
> The agenda can be found as usual at: http://www.w3.org/2009/sparql/wiki/Agenda-2010-01-05
> Will try to complete links to the reviews sent so far before the TC...
>
> best,
> Axel
>
> ============================
> Call in details
>
> When joining please don't identify yourself verbally; instead, identify yourself to Zakim on IRC
>
>        • Date of Call: Tuesday January 05, 2010
>        • Time of Call: 15:00 UK, 10:00 (East US)
>        • Dial-In #: +1.617.761.6200 (Cambridge, MA)
>        • Dial-In #: +33.4.89.06.34.99 (Nice, France)
>        • Dial-In #: +44.117.370.6152 (Bristol, UK)
>        • Participant Access Code: 77277# (SPARQ)
>        • IRC Channel: irc.w3.org port 6665 channel #sparql ([irc:irc.w3.org:6665/sparql])
>        • Web-based IRC (member-only): http://www.w3.org/2001/01/cgi-irc (Firefox IRC addon: chatzilla)
>        • Duration: 60 minutes
>        • Chair: Axel Polleres
>        • Scribe: Olivier Corby (Scribe List)
>        • Link to Agenda: http://www.w3.org/2009/sparql/wiki/Agenda-2010-01-05
>
> [edit] Agenda
>
>        • Admin
>                • PROPOSED: Approve minutes at http://www.w3.org/2009/sparql/meeting/2009-12-22
>                • Next meeting: 2010-01-12 @ 15:00 UK / 10:00 EST (scribe: Alex Passant)
>        • Comment handling - see http://www.w3.org/2009/sparql/wiki/Comments
>        • Liaisons - Anything to report?
>                • RIF WG (Axel)
>                • RDB2RDF WG (Orri)
>                • eGov (SteveH)
>        • Document Reviews and schedule for publication:
>                • http://www.w3.org/2009/sparql/docs/query-1.1/
>                • http://www.w3.org/2009/sparql/docs/update-1.1/
>                • http://www.w3.org/2009/sparql/docs/protocol-1.1/
>                • http://www.w3.org/2009/sparql/docs/service-description-1.1/
>                • http://www.w3.org/2009/sparql/docs/http-rdf-update/
>                • http://www.w3.org/2009/sparql/docs/property-paths/Overview.xml
>                • http://www.w3.org/2009/sparql/docs/entailment/xmlspec.xml
>        • Time allowed: Update ISSUEs, Can we close some? see Paul's and Andy's mails.
> [edit] Regrets
>
>        • Lee Feigenbaum
>
>
>



-- 
Dr. Birte Glimm, Room 306
Computing Laboratory
Parks Road
Oxford
OX1 3QD
United Kingdom
+44 (0)1865 283529
Received on Monday, 4 January 2010 15:00:48 GMT

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