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Re: LANG: Proposal to close ontology versioning (ISSUE 5.14)

From: Jeff Heflin <heflin@cse.lehigh.edu>
Date: Tue, 26 Nov 2002 10:49:51 -0500
Message-ID: <3DE3981F.D75CFA24@cse.lehigh.edu>
To: "Smith, Michael K" <michael.smith@eds.com>
CC: www-webont-wg@w3.org

Mike,

I'm not sure what you mean by extends vs. replaces. I see imports as a
way of "extending an ontology." A new version on the other hand is a
kind of "replacement." However, since we are in a distributed
environment we don't want to technically replace an ontology, beause
that may break dependencies on the prior version. So the best we can do
is say such-and-such is the latest version, and whether or not it is
backward-compatibile. Perhaps what you mean is that we can't say that a
new version is incompatible with a prior version. I consider this to be
the default: If backward-compatibility is not explicitly stated, then
incompatibility should be assumed.

If I have completely missed your point, could you explain what you mean
by extends and replaces?

Jeff

"Smith, Michael K" wrote:
> 
> Jeff,
> 
> I am pretty neutral on this, but it doesn't seem like the first two get to
> the important
> relations, which are whether one ontology is a COMPATIBLE extension or
> and INCOMPATIBLE extension.  I.e EXTENDS vs. REPLACES.
> 
>         I propose to add the following identifiers to the OWL namespace:
>         priorVersion
>         backCompatWith
>         deprecatedClass
>         deprecatedProperty
> 
> We can't say REPLACES.  The combination of priorVersion + backCompatibleWith
> 
> implies EXTENDS.
> 
> An interesting feature is that an ontology can say that it is a priorVersion
> of some
> other one.  Right?
> 
> - Mike
> 
> Michael K. Smith, Ph.D., P.E.
> EDS - Austin Innovation Centre
> 98 San Jacinto, #500
> Austin, TX  78701
> 
> * phone: +01-512-404-6683
> * mailto:michael.smith@eds.com
Received on Tuesday, 26 November 2002 10:49:55 GMT

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