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Re: how to describe the range of this kind of property

From: Jeremy Wong <50263336@student.cityu.edu.hk>
Date: Wed, 30 Mar 2005 23:32:57 +0800
To: l <linst@yourw.com.cn>, semantic-web <semantic-web@w3.org>
Message-id: <003501c5353d$bfda5040$0401a8c0@wongkjo9u38gzb>

l,

There are 2 ways to say that there are 3 students in the course.

A) Count the number of elements in the collection. Note that a collection is 
closed, i.e. no more elements can be added.

B) Add a property like "studentCount" to describe that there are 3 students.


Jeremy

----- Original Message ----- 
From: "l" <linst@yourw.com.cn>
To: "semantic-web" <semantic-web@w3.org>
Sent: Wednesday, March 30, 2005 11:12 PM
Subject: how to describe the range of this kind of property


> Hi all,
>
> It really confuse me.
> In http://www.w3.org/TR/2004/REC-rdf-primer-20040210, there is a example:
>   <rdf:Description rdf:about="http://example.org/courses/6.001">
>      <s:students rdf:parseType="Collection">
>            <rdf:Description rdf:about="http://example.org/students/Amy"/>
>            <rdf:Description 
> rdf:about="http://example.org/students/Mohamed"/>
>            <rdf:Description 
> rdf:about="http://example.org/students/Johann"/>
>      </s:students>
>   </rdf:Description>
>
>
> My question is how to describe the range of property s:students. Below is 
> a wrong description: <rdfs:range rdf:resource="#person"/>. This 
> description is not compatible with above example. With this range 
> description, I could only use s:students like this:
>  <rdf:Description rdf:about="http://example.org/courses/6.001"> 
> <s:students rdf:about="http://example.org/students/Amy"/>
>  <rdf:Description rdf:about="http://example.org/courses/6.001"> 
> <s:students rdf:about="http://example.org/students/Mohamed"/>
>  <rdf:Description rdf:about="http://example.org/courses/6.001"> 
> <s:students rdf:about="http://example.org/students/Johann"/>
>
>
> But actually, I want to say that this course has and only has 3 students, 
> no more, no less.
> How could I do.
> Please help.
>
> Thanks and regards
>
>
>  
>
>
>     
>  
>          
> 
Received on Wednesday, 30 March 2005 15:45:05 UTC

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