daml-ont

In the comment property defining Ontology, it states that an
ontology is a document describing a vocabulary ...

Is the ontology the document, or is the ontology an abstract
entity, and the document one of many possible
representations of it?  One might wish to make statements
about the abstract entity which are not true of the document
and statements about a document which are not true of the
abstract entity.  These should therefore have different URI's.

In the light of that, should the fomulaic:

  <Ontology about="">

have an absolute URI of the ontology between the "'s as the
element is describing the ontology, not the document.

[I am in general supportive of Sergey's stylistic suggestion
 that in general, URI's in about attribute values should be
 absolute - it is rather irritating to cut and paste a self
 contained chunk of RDF and find the semantics have changed.
 Also, if a mirror service stores an exact copy of an RDF
 document, to have the copy have different semantics to
 the original seems unhelpful.]

There are a couple of minor nits in the example ontology:

1) Father is desribed as having range Man, but presumably
   inherits domain Animal from Parent.  Mother is similar.

2) TallThing is omitted from the annotated version.

Brian McBride
HPLabs