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Re: [Core][PRD] Definition of safeness

From: Chris Welty <cawelty@gmail.com>
Date: Mon, 22 Jun 2009 11:15:00 -0400
Message-ID: <4A3F9FF4.9010808@gmail.com>
To: Christian De Sainte Marie <csma@fr.ibm.com>
CC: Axel Polleres <axel.polleres@deri.org>, Jos de Bruijn <debruijn@inf.unibz.it>, RIF <public-rif-wg@w3.org>, public-rif-wg-request@w3.org

All,

Are there any lingering concerns over the new definition of safeness?  Can we 
adopt this for Core & PRD?  We are already over a week late to publish.

-Chris

Christian De Sainte Marie wrote:
> All,
> 
> csma wrote on 17/06/2009 23:24:07:
>> [...[ I will implement the change on Friday morning my time.
> 
> Done.
> 
>> If somebody comes up
>> with a reasonably clear sentence to define B_psi wrt the sets of 
>> conjuncts in a DNF, I will add it in the definition of strong 
>> safeness; if not, I will copy, and edit as appropriate, the tree 
>> decomposition from the current definition of safeness. 
> 
> I came up with the following sentence, and edited the section on strong 
> safeness accordingly:
> 
> For every rule implication, φ :- ψ, we define the collection, Bψ, of the 
> sets of the atomic formulas in each of the conjunctions that are the 
> components of ψ', where ψ' is ψ rewritten as a condition formula in 
> disjunctive normal form, possibly existentially quantified itself, but 
> otherwise containing no existential sub-formula (see description of the 
> transform in the section Safeness, above). 
> 
> Feel free to improve the wording...
> 
> Cheers,
> 
> Christian
> 
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-- 
Dr. Christopher A. Welty                    IBM Watson Research Center
+1.914.784.7055                             19 Skyline Dr.
cawelty@gmail.com                           Hawthorne, NY 10532
http://www.research.ibm.com/people/w/welty
Received on Monday, 22 June 2009 15:16:44 GMT

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