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Re: LC comment: sameAs in OWL QL

From: Mike Smith <msmith@clarkparsia.com>
Date: Wed, 4 Feb 2009 10:16:45 -0500
Message-ID: <42485a40902040716y4e10ac5ch31ff459808c50d14@mail.gmail.com>
To: W3C OWL Working Group <public-owl-wg@w3.org>

On Tue, Feb 3, 2009 at 05:40, Ivan Herman <ivan@w3.org> wrote:

> In the current version of OWL QL, owl:sameAs (if you prefer, same
> individual assertion:-) is disallowed. Having checked with Boris (and
> also chatted with Bijan) it seems that the reason is that this leaves it
> open to possibly extend QL *either* to include owl:sameAs *or*
> (exclusive 'or') functional properties.
>
> In my view, it would be better to include one or the other to the
> document to make the QL standard profile clearer and cleaner for users.
> Introducing a loophole of extra extension would reduce the usability of
> QL in my view, mainly in terms of interoperability.
>
> The LOD movement, for better or worse, has already made an extensive use
> of owl:sameAs in linking billions of triples stemming from public
> databases. In view of that use case, my proposal is to _add_ the same
> individual assertion into OWL QL. That would make OWL QL way more
> attractive for an important user community.

This was one side of the discussion in [ISSUE-133].  I believe that
the email discussion linked to that issue (including the compromise
resolution [1]) are relevant when considering this LC comment.

-- 
Mike Smith

Clark & Parsia

[ISSUE-133] http://www.w3.org/2007/OWL/tracker/issues/133
[1] http://lists.w3.org/Archives/Public/public-owl-wg/2008Sep/0017.html
Received on Wednesday, 4 February 2009 15:17:26 GMT

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