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Re: Re[2]: Modelling Resumes in RDF(S) - work in progress

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Thu, 06 Jun 2002 15:21:04 +0300
To: Uldis Bojars <uldis.bojars@gmx.net>, RDF Interest <www-rdf-interest@w3.org>
Message-ID: <B9252E60.16381%patrick.stickler@nokia.com>

On 2002-06-06 12:52, "ext Uldis Bojars" <uldis.bojars@gmx.net> wrote:

> Hi, Patrick!
> 
> Sorry to trouble you again, but I have more questions than answers.
> (and these questions must look too simple to most people here).
> 
> PS>    <cv:Sex rdf:about="voc:blackeye.vsaa.lv/cv/sex/male">
> PS>       <rdfs:label xml:lang="en">Male</rdfs:label>
> PS>       <rdfs:label xml:lang="fi">Mies</rdfs:label>
> PS>       ...
> PS>    </cv:Sex>
> 
> Do these statements create instance voc:blackeye.vsaa.lv/cv/sex/male
> that I can refer to? If I do the same for /cv/sex/female, will it be
> correct to define person's sex property as:
> 
> <rdf:Property rdf:about="&cv_rdfs;sex"
>        rdfs:label="sex">
>       <rdfs:comment> Man / Woman. </rdfs:comment>
>       <rdfs:domain rdf:resource="&cv_rdfs;Person"/>
>       <rdfs:range rdf:resource="voc:blackeye.vsaa.lv/cv/sex/"/>
> </rdf:Property>

In the above example, I was presuming a URI for the Sex class
as "voc://blackeye.vsaa.lv.cv/Sex", with no trailing '/'. You
can't have a trailing '/' on a class name if you want to use
it in an element qname, as above (<cv:Sex ...)

(and apologies, I mistyped the voc:// URIs earlier and left out the
double slashes....   extra shame as it's my URI scheme ;-)

So, your range statement would be

    <rdfs:range rdf:resource="voc://blackeye.vsaa.lv/cv/Sex"/>

With that, your typed values will be valid for the range of
the property.

> Since I was unsure about the approach above, I followed another way:
> 
> 1. Defined SexProperty and it's instances (copied from SUO.daml):
> <rdf:Description ID="SexProperty">
> <rdfs:label>SexProperty</rdfs:label>
> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/>
> </rdf:Description>
> 
> <rdf:Description ID="Female">
> <rdfs:label>Female</rdfs:label>
> <rdf:type rdf:resource="#SexProperty"/>
> </rdf:Description>
> 
> <rdf:Description ID="Male">
> <rdfs:label>Male</rdfs:label>
> <rdf:type rdf:resource="#SexProperty"/>
> </rdf:Description>
> 
> 2. Defined range for sex property then:
> 
> <rdfs:range rdf:resource="http://nightman.lv/~captsolo/base.rdfs"/>

Presuming that "http://nightman.lv/~captsolo/base.rdfs" is the base
URI for your schema (and I'd just avoid fragment IDs altogether, they're
more trouble than they're worth) then you'd have to define the
range as

 <rdfs:range 
rdf:resource="http://nightman.lv/~captsolo/base.rdfs#SexProperty"/>

> Is this way to define this property valid and OK?
> I still do not understand where physically you define taxonomy for the
> former case, to use property value voc:blackeye.vsaa.lv/cv/sex/male
> for example.

Simply referencing a resource in an rdf:about "brings the
resource into being" so to speak. It's the URI that denotes
the resource, and the agreement by users to share a common
interpretation for a given URI is what brings that resource
into the RDF world.

> Another unclear question is defining boolean values.
> Are there some standard "TRUE" and "FALSE" or "YES" and "NO" URIs to
> use?

You can adopt the XML Schema datatype xsd:boolean if you like. That's
about as standardized as you are going to find, I think.

Patrick

--
               
Patrick Stickler              Phone: +358 50 483 9453
Senior Research Scientist     Fax:   +358 7180 35409
Nokia Research Center         Email: patrick.stickler@nokia.com
Received on Thursday, 6 June 2002 08:20:29 GMT

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