RE: differences between OWL 1 and OWL 2

Peter F. Patel-Schneider wrote:

>  The RDF-based semantics for OWL 2 is completely compatible with the
>  RDF-based semantics for OWL 1.  Some of the details of this semantics
>  have changed, but the set of inferences are the same.

I think the removal of the comprehension conditions [1] from the normative
set of semantic conditions is a significant change, and, to my knowledge,
has already been noticed by some. So saying "completely compatible" should
probably be avoided. 

The question is whether it should be mentioned in a user facing document.
Perhaps one can circumscribe it somehow (in a highlevel way), and point to
the "Changes" section [2] of the RDF-Based Semantics for technical details
(which then points to even more technical details :)).

Michael

[1] <http://www.w3.org/TR/owl-semantics/rdfs.html#comprehension_principles>
[2]
<http://www.w3.org/2007/OWL/wiki/RDF-Based_Semantics#Appendix:_Changes_from_
the_OWL_RDF-Compatible_Semantics_.28Informative.29>

--
Dipl.-Inform. Michael Schneider
Research Scientist, Dept. Information Process Engineering (IPE)
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