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Re: Modeling a specific construct - please help

From: Milan Zdravkovic <milan.zdravkovic@gmail.com>
Date: Fri, 11 Sep 2009 16:21:20 +0200
Message-ID: <2fc583910909110721y27cd6e8fj71befe608eaccd7d@mail.gmail.com>
To: public-owl-dev@w3.org
Thanks Uli !

2009/9/11 Uli Sattler <sattler@cs.man.ac.uk>

> this is a difficult one:
>
> - I assume that Ab, B, and C are individuals, and that 'preceeds' is
> 'directly preceeds' (otherwise, you should *not* conclude that A is
> ConcurrentWith C.
>
>
Yes, "preceeds" is not transitive property


> - you can introduce a transitive superproperty 'preceeds-trans' of preceeds
> and find all instances of the class (e.g., via OWL API and reasoner or via
> the DL query tab in Protege 4):
>
> (preceeds-trans value C) or (Inv(preceeds-trans) value C)
>
> if A is *not* in the answer to this query, then you can assume that it is
> ConcurrentWith C.
>
>
Thanks for the effort, but I would like to keep the ontology meaningfull,
that is to avoid using "supporting" concepts for inference. Do you possibly
know why "preceeds some (succeeds min 2 ProcessActivity)" is not working ? I
am confused about this - existential restriction works ("preceeds some
(succeeds some ProcessActivity)") but cardinality - obviously not ?!


> Cheers, Uli
>
>
>
> On 11 Sep 2009, at 12:27, Milan Zdravkovic wrote:
>
> I am a beginner in OWL, working on specific process ontology. I have a
>> problem in inferring the concurrency of process activities, for example - on
>> basis of asserted A preeceds B and C preceeds B, I need to infer that: A
>> isConcurrentWith C.
>> I was trying with modeling domain of isConcurrentWith with (Manchester
>> syntax):
>> preceeds some (suceeds min 2 ProcessActivity)
>> , where preceeds properties are asserted and suceeds is inferred inverse
>> property, but without success.
>>
>> Could you please help me on this ?
>>
>>
>>
>>
>


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Received on Friday, 11 September 2009 14:32:37 GMT

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