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

Hi l,

You'd better not to define the range of your property if you allow various 
classes for the range of the s:students property. It is not a must to define 
the range, anyway.

It is *possible* to use rdf:parseType="Collection" even you have defined the 
rdfs:range as #person. However, it means that the anonymous Collection is 
#person which is logically incorrect.


Jeremy

----- Original Message ----- 
From: "l" <linst@yourw.com.cn>
To: "Jeremy Wong" <50263336@student.cityu.edu.hk>
Cc: "semantic-web" <semantic-web@w3.org>
Sent: Wednesday, March 30, 2005 11:41 PM
Subject: Re: Re: how to describe the range of this kind of property


> Jeremy Wong,hi！
>
> thanks.
> I prefer the first way. But how to describe the range of s:students? As i 
> said, if it is <rdfs:range rdf:resource="#person"/>, it is impossible to 
> use rdf:parseType="Collection" after s:students.
> regrads.
>
> ======= 2005-03-30 23:32:57 您在来信中写道：=======
>
>>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
>>>
>>>
>>> 　
>>>
>>>
>>> 　　　　
>>> 　
>>> 　　　　　　　　　
>>>
>>
>>
>>
>
> = = = = = = = = = = = = = = = = = = = =
>
>
> 　　　　　　　　致
> 礼！
>
>
> 　　　　　　　　l
> 　　　　　　　　linst@yourw.com.cn
> 　　　　　　　　　　2005-03-30
>
>

Received on Wednesday, 30 March 2005 15:58:13 UTC