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Re: Property Names, was Re: Automotive, EXIF, Property-Values

From: Holger Knublauch <holger@topquadrant.com>
Date: Thu, 18 Dec 2014 10:21:52 +1000
Message-ID: <54921E20.6090007@topquadrant.com>
To: public-vocabs@w3.org
On 12/18/2014 0:13, mfhepp@gmail.com wrote:
> Side-comment:
> Personally I think we will have to go to a "frame-based" approach in schema.org sooner or later, i.e. defining properties locally for each type or supertype, so that name clashes between independent branches of schema.org will not be too much of a problem.
> So "code" for http://schema.org/MedicalTherapy would no longer need to be the same as "code" in any other context.


FWIW there is an active W3C group on Data Shapes [1] where the topic of 
how to associate properties with classes is an important issue. One 
proposal (that I am supporting there) is using a (Turtle) syntax such as

     a rdfs:Class ;
     rdfs:subClassOf schema:Thing ;
     :property [
         :predicate schema:code ;
         :valueType schema:MedicalCode ;
         rdfs:label "code" ;
         rdfs:comment "A medical code for the entity, taken from a 
controlled vocabulary or ontology such as ICD-9, DiseasesDB, MeSH, 
SNOMED-CT, RxNorm, etc." ;
     ] ; ...

which resolves some of the problems of only having global property 
definitions like in RDF Schema. It avoids the problems of 
rdfs:domain/range (and schema:domainIncludes/rangeIncludes), has the 
ability to have context-specific comments and labels, as well as 
additional property characteristics, all in a single consistent format. 
(Note that I used the default namespace for the system properties 
because this proposed language does not have a name yet).

The JSON-LD would look similar and can hopefully be inferred.

I'd appreciate feedback if such a syntax as above would be of interest 
to the schema.org community and future versions of the RDF mapping.

Disclaimer: although I am a member of that W3C group, I do not speak on 
behalf of the group - no decisions have been made yet, and the above is 
my personal proposal.


[1] http://www.w3.org/2014/data-shapes/wiki/Main_Page
Received on Thursday, 18 December 2014 00:24:55 UTC

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