W3C home > Mailing lists > Public > public-rif-wg@w3.org > May 2010

Re: Urgent: Issue with RIF-Core EBNF Grammar?

From: Jos de Bruijn <jos.debruijn@gmail.com>
Date: Wed, 12 May 2010 10:36:30 +0200
Message-ID: <AANLkTini6VUSJhI_CePZ4-3e9C7nnZLCxKNVvN0ZM0do@mail.gmail.com>
To: Axel Polleres <axel.polleres@deri.org>
Cc: Christian De Sainte Marie <csma@fr.ibm.com>, RIF <public-rif-wg@w3.org>
Axel, Christian, all,

I raised my concerns about the RIF-Core spec in a separate email.

Concerning facts about class membership: they are both in BLD and PRD (see
[1]).
Concerning class membership atoms in rule conclusions: I do remember that we
explicitly forbade them in Core.


Best, Jos

[1] http://www.w3.org/2005/rules/wiki/PRD#Actions_2

On Tue, May 11, 2010 at 10:33 PM, Axel Polleres <axel.polleres@deri.org>wrote:

>
> On 11 May 2010, at 19:10, Christian De Sainte Marie wrote:
>
> >
> > Axel Polleres <axel.polleres@deri.org> wrote on 11/05/2010 19:49:27:
> > >
> > > The point is: if the membership facts don't "materialise" in RIF,
> > > how can any rule with a membership assertion in the body ever fire...?
> > > (maybe that view is too operational)
> >
> > Why should they "materialize" in RIF? The only place where you need them
> to "materialize" is where you implement your RIF rules!
> >
> > That RIF cannot represent facts does not mean that the environment, or
> even the rule language, in which you implement the rules recovered from a
> RIF document cannot either.
> >
> > Thus, you can import the rules from RIF into your inference engine, and
> the facts from somewhere else. Actually, I would expect that this is the
> case in most usage scenarios.
> >
> > Does that make sense?
>
> I see your point, if that was the intention and is not a problem to anyone
> else, I guess I can live with it.
>
> Axel
>
> >
> > Christian
> >
> > IBM
> > 9 rue de Verdun
> > 94253 - Gentilly cedex - FRANCE
> > Tel. +33 1 49 08 35 00
> > Fax +33 1 49 08 35 10
> >
> >
> > Sauf indication contraire ci-dessus:/ Unless stated otherwise above:
> > Compagnie IBM France
> > Siege Social : 17 avenue de l'Europe, 92275 Bois-Colombes Cedex
> > RCS Nanterre 552 118 465
> > Forme Sociale : S.A.S.
> > Capital Social : 611.451.766,20 
> > SIREN/SIRET : 552 118 465 03644
> >
>
>
>


-- 
Jos de Bruijn
 Web:          http://www.debruijn.net/
 LinkedIn:     http://at.linkedin.com/in/josdebruijn
Received on Wednesday, 12 May 2010 08:37:24 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Wednesday, 12 May 2010 08:37:25 GMT