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[protege-discussion] Problems with disjoint classes

Alex Shkotin alex.shkotin at gmail.com
Mon May 30 05:33:04 PDT 2011


what about to say

Class: F EquivalentTo: A or B or C

It is better to discuss real classes and relationships. For example if we
have bone, tendon and cartilage disjoint classes then physically_connected
may be a good object property to connect an instances of these classes to
sceleton.

2011/5/30 Julian Vincent <j.f.v.vincent at bath.ac.uk>

> Sorry - I can't understand this.  I can see that I need to introduce some
> sort of connection in a disjoint-free class, but I can't see how this should
> be done.  It has the appearance of a standard technique, but I don't know
> what that technique is.  Could you possibly sketch out what class structure
> I should end up with?
> To re-iterate and expand slightly:
> I have disjoint classes A, B and C which I wish to use with a single other
> subclass D.  I may need to use the same classes to describe another subclass
> E which is disjoint with subclass E
>
> I have disjoint classes a, b and c and wish to make them all members of
> another subclass.
>
> Or are these problems both the same??
>
> Julian
>
>
> On 30 May 2011, at 12:50, Alex Shkotin wrote:
>
> > Hi Julian,
> >
> > you should have relationships between individuals of your disjoint
> classes. Just describing real type of connection between bone and tendon...
> > Than an instance of sceleton should be all connected individiuals and
> sceleton "area" is a union of your classes.
> >
> > Alex
> >
> > 2011/5/30 Julian Vincent <j.f.v.vincent at bath.ac.uk>
> > I want to describe (for instance) a an organ such as a skeleton made of
> tissues such as bone, tendon and cartilage.   But all the tissues are
> disjoint.  So the skeleton is not passed by the Reasoner and is assigned to
> the 'Nothing' class.
> > An inverse of this, producing the same problem, is to take a number of
> objects, such as an exoskeleton (an organ), a microtubule (an organelle) and
> a bone (a tissue) and say that they all provide support.  But organ,
> organelle and tissue are disjoint.
> >
> > What's the way around this?
> >
> > Julian Vincent
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