I love reading and working this but I am inundated with these
emails ... Please respectfully unsubscribe me from the strings ... Marc (02)
On Dec 9, 2010, at 8:29 PM, Dean Allemang <dallemang@xxxxxxxxxxxxxxx>
> On 12/9/2010 6:32 PM, Ian Horrocks wrote:
>> On 9 Dec 2010, at 07:21, Bradley Shoebottom wrote:
>>> I attended a recent TopQuadrant training session in which it was
>>> expressed that OWL-2 was overly complex and that OWL-RL could do
>>> everything that OWL 2 could with less restrictions.
>> I find this statement to be strange tending to disingenuous.
> I suppose as written, the statement tends to disingenuous, but I'd
> to cut Bradley some slack - it is a one-sentence summary of what was
> probably a two-hour long discussion (I don't think I was the TQ
> instructor for Bradley's class, but I have a pretty good idea of the
> curriculum of all our courses; OWL usually gets at least 2 hours, even
> in an expurgated course).
> I find that in the classes I do teach, the students are very concerned
> about complexity in the computational sense, so in fact, Ian's comment
> about the one sense in which Bradley's statement is accurate, is
> the one they are interested in.
> The only part of this statement that I find strange it is the
> that OWL-RL can do everything that OWL 2 (DL) can do. To adjust this
> statement, I would say that for many applications, OWL RL allows one
> represent everything one needs, among things that can be represented
> OWL at all (see John Sowa's comment elsewhere in this thread). That
> seems quite reasonable, especially in light of how many very useful
> models can be expressed with just RDFS+inverse+transitive. Again, I
> would cut Bradley some slack; this is almost a throw-away one-liner
> - I
> don't expect him to be this precise.
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