FW: question about list and range of property

Rdf schema:
<knows, rdf;range, PersonList>
<PersonList, rdf:subClassOf, rdf:List>
<PersonList, rdf:first, Person>
<PersonList, rdf:rest, PersonList>
 
The last two you can use “allValuesFrom” constraint in OWL.
So the snipped OWL is like:
 
<owl:Class rdf:ID="PersonList">
<rdfs:subClassOf
rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#List" /> 
<rdfs:subClassOf>
 <owl:Restriction>
  <owl:onProperty
rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#first" /> 
  <owl:allValuesFrom rdf:resource="#Person" /> 
 </owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
 <owl:Restriction>
  <owl:onProperty
rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#rest" /> 
  <owl:allValuesFrom rdf:resource="#PersonList" /> 
 </owl:Restriction>
</rdfs:subClassOf>
</owl:Class>
 
Then you can use the way you wrote.
 
Best regards,
Zhu, Bin
 
http://www.uclab.org/zhubin/
 
--
Ubiquitous Computing Lab (http://www.uclab.org)
 
-----Original Message-----
From: www-rdf-interest-request@w3.org
[mailto:www-rdf-interest-request@w3.org] On Behalf Of Shengping Liu
Sent: 2004年6月11日 1:20
To: www-rdf-interest@w3.org
Subject: question about list and range of property
 
Hi,
  If in my RDF Schema,  the range of property knows is Person, i.e.,
<knows, rdfs:range Person>
then if some one knows many persons, can I write this in RDF?
<Person rdf:ID=”P1”>
<knows parseType=”collection”> 
       <Person rdf:resource=”#P2”>
       <Person rdf:resource=”#P3”>
    </knows>
</Person>
 
is this RDF file validated against the RDF Schema?
 
1)       If true: by the semantics of rdfs:range , an instance of
rdf:List  would be  a Person, seems error; 
2)       If false:  then I must define the range of property “knows”
is rdf:List, but I can’t constrict the list 
that only contains instances of  Person, and this definition would be
contrary to the intuition 
and make RDF data aggregation difficult. 
 
What is your idea? Thanks!
 
= = = = = = = = = = = = = = = = = = = = = = = = = = = =  
Shengping Liu
Department of Information Science, Peking University, China.
 
Phone: 86-10-62757175
Mail:  lsp@is.pku.edu.cn