Hi Dimitris,

Thank you for your reply and assistance.  I have solved the subclass
inference problem with Wikidata that is a problem for comparison of
taxonomic terms.  The method is quite simple and it might be useful for
dbpedia to implement for the taxon classes and for other ontological
subclass relationships.  The main problem is with transitivity.  In order
to enable transitive inferencing in Virtuoso, a rule set needs to be
created.  For the Wikidata taxons, this looks like this:

rdfs:subClassOf  rdf:type owl:TransitiveProperty .
wdt:P171 rdf:type owl:TransitiveProperty .
wdt:P279 rdf:type owl:TransitiveProperty .
wdt:P361 rdf:type owl:TransitiveProperty .
wdt:P171 owl:sameAs rdfs:subClassOf .
wdt:P279 owl:sameAs rdfs:subClassOf .
wdt:P361 owl:sameAs rdfs:subClassOf .

On 20 April 2016 at 11:41, Dimitris Kontokostas <jimk...@gmail.com> wrote:

> Hi Christopher,
>
> this definitely looks promising. I posted some comments on your idea to
> give you some direction.
> We recently created wikidata.dbpedia.org that can help with the diffing /
> merging etc
> here's a version http://arxiv.org/abs/1507.04180 (we plan an updated
> version soon)
>
> please have a look at that work and we can discuss ways to improve /
> collaborate etc
>
> On Thu, Apr 14, 2016 at 7:10 PM, Christopher Johnson <
> chjohnso...@gmail.com> wrote:
>
>> Hi,
>>
>> I have posted my idea for federating wikidata and dbpedia here:
>> http://wiki.dbpedia.org/ideas/idea/248/federating-wikidata-and-dbpedia-with-triple-pattern-fragments/
>>
>> The method works.  I think that this could provide a helpful supplement
>> to both Wikidata and DBpedia.  The primary use case is for diffing,
>> comparison and merging of Wikidata values with DBpedia values for the same
>> resource concept.  An inexpensive validation method is definitely needed to
>> ensure balance between these increasingly disparate data sources.
>>
>> Much work still remains, but this seems to offer a promising way forward.
>>
>> Christopher Johnson
>>
>>
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>
>
> --
> Kontokostas Dimitris
>
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