Get "most specific property"

• From: Carsten Keßler <carsten.kessler@uni-muenster.de>
• Date: Wed, 29 Aug 2012 17:58:06 +0200
• To: public-sparql-dev@w3.org
• Message-ID: <CANqMnYMhPWmV7k-j9x3SKHYWyCvbN8=MrLbep7Sj43FtNNMFeg@mail.gmail.com>

Dear SPARQLers,

I'm trying to fetch the most specific properties for a class, and I'm
stuck. I want to pull out all the properties that apply for a given
class (including those inherited from superclasses), except those
properties that have subproperties in the result set.

For example, if I have a class Population with one of its properties
being atLocation, and a subclass of Population called Refugees.
Refugees has a property currentLocation, which is a subProperty of
atLocation.

So what I want is a generic query that would give me only atLocation
if I put in Population, and only currentLocation if I put in Refugees.
What I have is this:

prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix ex: <http://example.org/vocabulary#>

SELECT DISTINCT ?prop WHERE {
  ex:Refugee rdfs:subClassOf* ?domain  .
  ?prop rdfs:domain ?domain .
  ?subprop rdfs:domain ?domain .
  FILTER NOT EXISTS { ?subprop rdfs:subPropertyOf ?prop . }
} ORDER BY ?prop

This gives me both atLocation and currentLocation, though.

Is this possible in one query at all? Any ideas on how to solve this
appreciated!

- Carsten

Received on Wednesday, 29 August 2012 15:58:34 UTC