Re: [foaf-dev] SPARQL Querying CCO

Hi Rob,

On 5/30/2011 7:58 PM, Rob Stewart wrote:
> Hi Bob,
>
> Thanks. OK, would it be possible then to generate some RDF, so as we
> can weight foaf:knows. e.g. So that the following SPARQL query will
> give us the weights:
>
> PREFIX foaf:<http://xmlns.com/foaf/0.1/>
> PREFIX cco:<http://purl.org/ontology/cco/core#>
> PREFIX wo:<http://purl.org/ontology/wo/core#>
> PREFIX ex:<http://example.org/>
> SELECT ?name ?friendname ?wv
> WHERE
>     { ?x foaf:name ?name .
>       ?x cco:habit ?h .
>       ?h cco:topic ?otherPerson .
>       ?h cco:characteristic foaf:knows .
>       ?otherPerson foaf:name ?friendname .
>       ?h wo:weight ?w .
>       ?w wo:weight_value ?wv . }

Well, I wouldn't really count a 'knows' relation as a cognitive pattern, 
or? However, you can create similar, detailed descriptions for a 'knows' 
relation on basis of an appropriated reification class (in the following 
example this is ex:HumanRelationship), e.g.,

# the shortcut relation
<#alice> foaf:knows <#bob> .

# the reification class instance
<#ab>
      a ex:HumanRelationship ;
      ex:participant <#alice>, <#bob> ;
      ex:relationshipType foaf:knows ;
      wo:weight [
          a wo:Weight ;
          wo:weight_value 9.0 ;
          wo:scale ex:AScale
          ] ;
      ex:since "2008-04"^^xsd:gYearMonth .
<#alice> ex:relationship <#ab> .


# the SPARQL query
PREFIX foaf:<http://xmlns.com/foaf/0.1/>
PREFIX cco:<http://purl.org/ontology/cco/core#>
PREFIX wo:<http://purl.org/ontology/wo/core#>
PREFIX ex:<http://example.org/>
SELECT ?name ?friendname ?wv
WHERE
     { ?x foaf:name ?name .
       ?x ex:relationship ?r .
       ?r ex:participant ?person .
       ?r ex:relationshipType foaf:knows .
       ?person foaf:name ?friendname .
       ?r wo:weight ?w .
       ?w wo:weight_value ?wv . }


>
>
> Or is WO: truly only to represent weighted interests (all of the
> examples on [1] are related to interests).

The Weighting Ontology is a domain independent ontology for representing 
weightings*. The examples on [1] demonstrate the utilisation of WO in 
the context of cognitive pattern modelling examples that are based on 
the Cognitive Characteristic Ontology.

Cheers,


Bob


PS: The issues that the Property Reification Vocabulary [2] is intended 
to cover is the ability to create property reification definitions that 
describe the semantic relation between specific shortcut relations and 
related reification class instances (that describe a concrete shortcut 
relation more in detail)


*) separation of concerns and modularization should be/is a preferred 
ontology design principle

>
> 1 - http://smiy.sourceforge.net/cco/spec/cognitivecharacteristics.html

[2] http://purl.org/ontology/prv/core#