Re: Pizza ontology in Topic Maps? in CTM?

Hi Mariiane,

My suggestion would be to try and describe the pizza ontology using
the constructs in TMCL. (http://www.isotopicmaps.org/tmcl/tmcl.html).
TMCL contains ontology constructs that can be expressed as a topicmap
and the examples in the standard all use CTM. You should find many
things in TMCL that you have seen in OWL.

Lars Marius has a tutorial on TMCL,
http://www.garshol.priv.no/blog/180.html, and I am only mildly
offended by his main photo! :)

Graham



On 9 December 2011 21:29, marijane white <[email protected]> wrote:
> Hello Topic Mappers,
>
> So I have this new job where I get to build models, but my employer uses
> OWL-DL rather than Topic Maps.  I definitely think about modeling in Topic
> Maps, so I've been scaling the RDF/OWL learning curve, and one of the things
> I've done to that end is walk through the Manchester Pizza Tutorial for OWL
> [1],which seems like a good introduction, despite the fact that the pizza
> ontology itself seems somewhat flawed.
>
> Earlier this week, it occurred to me to try recreating the pizza ontology in
> Topic Maps, to help cement my understanding of both technologies, and maybe
> also bring my TM skills up to date by learning CTM, because so far the topic
> maps I've created by hand have been in XTM 1.0.   I got as far as faithfully
> recreating the tutorial's hierarchy of pizzas, toppings, and bases, but when
> I hit the part about modeling hasIngredient relationships between pizzas and
> their toppings or bases, I was like, "Wait a minute -- isn't a pizza really
> as association between a crust and some toppings?"  I'm not sure if this is
> really true. I've been chewing on it for a couple of days now, and I thought
> I'd come here and ask y'all about it.
>
> So, my questions:
> - Has anyone here ever done the pizza tutorial for OWL?
> - Has anyone here ever tried implementing the examples in the pizza tutorial
> as a topic map?  Is this a silly idea?
> - Do you think the idea that a pizza is an association between a crust and
> some toppings seems like an appropriate way to model a pizza?
> - If so, how would you express this in CTM?  I'm struggling with how to
> identify instances of associations, and also it's not clear to me if CTM
> supports n-ary associations.
>
> For example, how about a pepperoni pizza?
> pizza(base: Thin_and_Crispy, topping: Mozzarella, topping: Pepperoni)
> Or maybe a margherita pizza?
> pizza(base: Thin_And_Crispy, topping: Mozzarella, topping: Tomato, topping:
> Basil)
>
> Is this allowed?  Is it a bad idea?  Do I need to try a different modeling
> approach?
> If I wanted to refer to these instances by name elsewhere in the topic map,
> how do I do that?  Add a reifier?
> How about adding scoped names to the association roles?
>
> I think I know how I would do these things in XTM 1.0 but it's not yet clear
> if I can or should do them in CTM.  (I have a suspicion some of the modeling
> habits I developed using XTM 1.0 might be considered poor modeling
> practice.)
>
>
> Thanks for any assistance anyone might be able to provide.
>
> -marijane
>
> [1] - http://owl.cs.manchester.ac.uk/tutorials/protegeowltutorial/
>
>
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-- 
Graham Moore, Director, Networked Planet Limited
Editor XTM 1.0, ISO13250 (TopicMaps) -2,-3, TMCL
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