RE: [OEP] or [UNITS] : How to explicitly define a Metaclass

[OEP] or [UNITS] : How to explicitly define a MetaclassHi Marco,

I think that Natasha's draft document explains perfectly what you ask,

Oscar
  -----Mensaje original-----
  De: public-swbp-wg-request@w3.org [mailto:public-swbp-wg-request@w3.org]En
nombre de NANNI Marco FTRD/DMI/SOP
  Enviado el: miércoles, 14 de abril de 2004 18:07
  Para: SWBPD
  Asunto: [OEP] or [UNITS] : How to explicitly define a Metaclass


  Hello,

  I have two little questions directly linked with our current projects :

  1) I would like to be able to link two classes with a Property in OWL

  is that OWL fragement correct ? :

          <owl:Class rdf:ID="MyMetaClass">
                  <rdfs:subClassOf rdf:resource="owl:Class" />
          </owl:Class>

          <rdfs:Class rdf:ID="ClassProperty">
                   <rdfs:subClassOf rdf:resource="owl:ObjectProperty" />
          </rdfs:Class>

          <ClassProperty rdf:ID="Require">
                  <rdfs:domain rdf:resource="#MyMetaClass"/>
                  <rdfs:range rdf:resource="#MyMetaClass"/>
          </ClassProperty>

          <MyMetaClass rdf:ID="Class2">

          <MyMetaClass rdf:ID="Class1">
                  <Require rdf:resource="#Class2">
          </MyMetaClass>



  or is  this one correct and if yes better than the first one ?

          <owl:Class rdf:ID="MyMetaClass">
                  <rdfs:subClassOf rdf:resource="owl:Class" />
          </owl:Class>

          <rdfs:Class rdf:ID="ClassProperty">
                   <rdfs:subClassOf rdf:resource="owl:ObjectProperty" />
                  <rdfs:subClassOf>
                           <owl:Restriction>
                                  <owl:onProperty rdf:resource="rdfs:domain"
/>
                                  <owl:hasValue rdf:resource="#MyMetaClass">
                          </owl:Restriction>
                  </rdfs:subClassOf>
                  <rdfs:subClassOf>
                           <owl:Restriction>
                                  <owl:onProperty rdf:resource="rdfs:range"
/>
                                  <owl:hasValue rdf:resource="#MyMetaClass">
                          </owl:Restriction>
                  </rdfs:subClassOf>
          </rdfs:Class>

          <ClassProperty rdf:ID="Require">

  2) I would like to be able to use weighedProperty between Classes (but i
suppose it is the same problem with Instances) to traduce for example the
following fact :

                  "For the Job XXX the competency Competency1 is more
important than Competency2"

          In fact I would like to be able to write some OWL fragment like
this :

          <MyMetaClass rdf:ID="Competency">
          <MyMetaClass rdf:ID="Title">

          <MyMetaClass rdf:ID="C1">
                  <rdfs:subClassOf rdf:resource="#Competency" />
          </MyMetaClass>
          <MyMetaClass rdf:ID="C2">
                  <rdfs:subClassOf rdf:resource="#Competency" />
          </MyMetaClass>

          <MyMetaClass rdf:ID="T1">
                  <rdfs:subClassOf rdf:resource="#Title" />
                  <Require rdf:resource="#C2"    weigh = 3>
                  <Require rdf:resource="#C1"    weigh = 5>
          </MyMetaClass>

  In fact, more generally i would like to use weighed owl/rdf properties to
modelise real life weighed relations

  Do I have or is it possible to define something like a subclass of
rdf:Property with a new syntax to write something similar to

          <Require rdf:resource="#C2"    weigh = 3>



  Thank you very much

  Best regards

  Marco NANNI