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OWL documents and OWL ontologies

From: Jerome Euzenat <Jerome.Euzenat@inrialpes.fr>
Date: Mon, 6 Jan 2003 11:16:47 +0100
Message-Id: <a05200f08ba3f06a229ba@[194.199.20.189]>
To: www-webont-wg@w3.org


 From Guide:
"Once namespaces are established we begin with an assertion that what 
follows is an OWL document.
<owl:Ontology rdf:about="http://www.example.org/wine">
"

I have a problem with this Ontology constructor. Are the following 
documents OWL-documents, Ontologies ?

-------------------- document 1 -------------------
<?xml version="1.0"?>

<rdf:RDF
   xmlns     = "http://www.example.org/food#"
   xmlns:food= "http://www.example.org/food#"
   xmlns:owl = "http://www.w3.org/2002/7/owl#"
   xmlns:rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:rdfs= "http://www.w3.org/2000/01/rdf-schema#">

   <owl:Ontology rdf:about="http://www.example.org/food.owl">
     <rdfs:comment>Consider that the about is my URL</rdfs:comment>
   </owl:Ontology>

   <owl:Class rdf:ID="ConsumableThing" />

</rdf:RDF>
---------------- end of document 1 ----------------

Questions (easy):
a) is this a valid OWL document
b) what is the relation between http://www.example.org/food.owl#ConsumableThing
  and the Ontology of URI http://www.example.org/food.owl ?
c) Does http://www.example.org/food.owl entails
       http://www.example.org/food.owl#ConsumableThing rdf:type owl:Class .

Same questions with <owl:Ontology rdf:about=""> found in the 
Reference document.

-------------------- document 2 -------------------
<?xml version="1.0"?>

<rdf:RDF
   xmlns     = "http://www.example.org/food#"
   xmlns:food= "http://www.example.org/food#"
   xmlns:owl = "http://www.w3.org/2002/7/owl#"
   xmlns:rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:rdfs= "http://www.w3.org/2000/01/rdf-schema#">

   <owl:Ontology rdf:about="http://www.example.org/food.owl">
     <rdfs:comment>Consider that the about is my URL</rdfs:comment>
   </owl:Ontology>

   <owl:Ontology rdf:about="http://www.example.org/mood.owl">
     <rdfs:comment>Consider that the about is not dereferenced to 
anything</rdfs:comment>
   </owl:Ontology>

   <owl:Class rdf:ID="ConsumableThing" />

</rdf:RDF>
---------------- end of document 2 ----------------

Questions:
a) is this a valid OWL document?
a') is http://www.example.org/mood.owl a valid ontology?
b) what is the relation between http://www.example.org/food.owl#ConsumableThing
  and the Ontology of URI http://www.example.org/food.owl?
b') same with mood.owl?
c) Does http://www.example.org/food.owl entails
       http://www.example.org/food.owl#ConsumableThing rdf:type owl:Class .
c') same with mood.owl?



-- 
  Jérôme Euzenat                  __
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  INRIA Rhône-Alpes,            _/  _   _   _ _    _
                               /_) | ` / ) | \ \  /_)
  655, avenue de l'Europe,    (___/___(_/_/  / /_(_________________
  Montbonnot St Martin,       /        http://www.inrialpes.fr/exmo
  38334 Saint-Ismier cedex,  /          Jerome.Euzenat@inrialpes.fr
  France____________________/                Jerome.Euzenat@free.fr
Received on Monday, 6 January 2003 05:27:33 GMT

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