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question on "forest-like anonymous individuals" restriction of OWL 2 DL

From: Michael Schneider <schneid@fzi.de>
Date: Fri, 29 May 2009 20:45:30 +0200
Message-ID: <0EF30CAA69519C4CB91D01481AEA06A001413D0E@judith.fzi.de>
To: "OWL 1.1" <public-owl-wg@w3.org>
Hi all!

I had to explain to someone the "forest-like anonymous individuals" restriction of OWL 2 DL (Section 11.2 of the Structural Spec), but I found myself uncertain about it. In particular, I'm unclear how "fixed" the variable "OPE" is in the set of conditions.

But it's easier to show my problem by an example: It's clear to me (also from the example following the formal definition) that the following is /not/ allowed in OWL 2 DL:

  _:x :p _:y
  _:y :p _:x

But what about

  _:x :p _:y
  _:y :q _:x

with /different/ properties?


Dipl.-Inform. Michael Schneider
Research Scientist, Dept. Information Process Engineering (IPE)
Tel  : +49-721-9654-726
Fax  : +49-721-9654-727
Email: michael.schneider@fzi.de
WWW  : http://www.fzi.de/michael.schneider
FZI Forschungszentrum Informatik an der Universität Karlsruhe
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Tel.: +49-721-9654-0, Fax: +49-721-9654-959
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Received on Friday, 29 May 2009 18:46:08 UTC

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