W3C home > Mailing lists > Public > public-rif-wg@w3.org > May 2008

Re: importing RDF and OWL

From: Jos de Bruijn <debruijn@inf.unibz.it>
Date: Mon, 26 May 2008 09:21:26 +0100
Message-ID: <483A7306.1010901@inf.unibz.it>
To: Dave Reynolds <der@hplb.hpl.hp.com>
CC: Sandro Hawke <sandro@w3.org>, public-rif-wg@w3.org
>>>> Part of my motivation for this is that the context list should be 
>>>> openly extensible. For example, I suspect the OWL-R fragment 
>>>> currently being defined in the OWLWG may be very important for RIF. 
>>>> We might even want to predefine an IRI to refer to it (so long as we 
>>>> can do so without entangling the specs). That seems easier if there 
>>>> isn't a predefined promotion hierarchy to fit into.
>>>
>>> The list of profiles is meant to be extensible, and I will update the 
>>> text to reflect that (probably just before the telephone conference 
>>> tomorrow :-)).
>>> But we still need to deal with the situation where different profiles 
>>> are specified, if only in the above-mentioned scenario of rule set 
>>> imports.
>>
>> I updated the text to say explicitly that the list of profiles is not 
>> closed [1].  I also added a clause to deal with the situation that 
>> there is not a single highest profile (basically, the ruleset should 
>> be rejected).
>> I hope this addresses your concern.
> 
> Sorry, I'm not sure that it does.
> 
> My point was that if the list of profiles is open then the concept:
> 
>    "lowest profile that interprets RIF-RDF combinations and is
>     higher than or equal to all profiles in Profile"
> 
> is not well defined. New entries might, in principle, be lower than the 
> previous lowest profile but higher than those in Profile.
> 
> It seems easier to me easier to say "if there is a single highest 
> profile use that otherwise reject". At present the only intersection 
> point between the two partial orderings is OWL-Full and if someone wants 
> a rule which imports both a DL and an RDF chain and interprets it under 
> OWL-Full then they can simply set the import profile to be OWL-Full for 
> one or other import.

Makes sense.
Unless anyone objects, I will implement this change.


Best, Jos

> 
> Dave

-- 
                          debruijn@inf.unibz.it

Jos de Bruijn,        http://www.debruijn.net/
----------------------------------------------
One man that has a mind and knows it can
always beat ten men who haven't and don't.
   -- George Bernard Shaw


Received on Monday, 26 May 2008 08:22:15 GMT

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