Re: Models: Subclassing

[Kathy Dally <kdally@mitre.org>]

Hi Jim!

There are no restrictions in X.501 on structural and auxiliary classes
being subclasses of one another.  Although it doesn't make a lot of
sense to me, I have seen cases where several structural object classes
have an auxiliary as the superclass.  I can't think of an example of the
reverse, off hand.

Thanks,
Kathy


Jim Sermersheim wrote:
> 
> Section 2.4 describes object class subclassing, but should express the
> effect of subclassing (namely that a subclass inherits the MUST and MAY
> list(s) of superior object classes in its superclass chain, but does not
> inherit Name Forms or DIT Content Rules)
> 
> Section 2.4.2 states "Structural object classes cannot subclass
> auxiliary object classes." and Section 2.4.3 states "Auxiliary object
> classes cannot subclass structural object classes.". I can't find these
> restrictions in X.501--can you point out the reference?
> 
> Jim