From: Frank van Harmelen ([email protected])
Date: 01/10/01
Dear Joint-all,
After the teleconf last night I implemented all of the required changes in the example, the walkthrough and the reference document. 
You can find them in the usual location: <http://www.cs.vu.nl/~frankh/spool/DAML+OIL>
As usual, hunt for the dark grey-matter :-), since that is were the changes are:
1. implemented all comments from everybody last week (thanks to all for the careful and often inspired reviewing)
2. implemented Jessica's fix to the namespace bug (example & walkthrough)
3. added an explanation on the collection-construction (reference document)
4. explained the non-difference between ID= & about= (walkthrough)
5. removed restrictedBy in favour of subClassOf (all files, code & text)
Some specific points:
All: I consider these documents ready for release (modulo removing the do-it-yourself versioning-by-colour-scheme, of course), so speak now or...
Dan: I would appreciate if you could inspect point [3], at http://www.cs.vu.nl/~frankh/spool/DAML+OIL/reference.html#collection
Jeff: can you supply me with explanatory text on the imports element?
Mike: contact me if you want the versioning-free versions.
Ora/Deb: can you point to the new RDF survival guide that Ora wrote?
Point [5] has really made the language very much nicer. I was struck by the elegant symmetry that now exists between:
<Class ID="C1">
 <subClassOf>
   <Restriction>
     some property constraint
   </Restriction>
 </subClassOf>
</Class>
and 
<Class ID="C2">
 <sameClassAs>
   <Restriction>
     some property constraint
   </Restriction>
 </sameClassAs>
</Class>
for stating necessary-only or necessary-and-sufficient conditions on a class. Pretty.
Frank.
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