On Mon, Apr 14, 2014 at 6:55 PM, Patel-Schneider, Peter <
peter.patel-schnei...@nuance.com> wrote:
> So each mapping has to explicitly state that the object belongs to
> owl:Thing?
>
No, you just need to specify to loweset subclass and the framework adds all
the superclasses / equivalent classes
> And the mapping for Philosopher has to explictly state that the object
> belongs to Person, foaf:Person, schema.org:Person, Agent, and owl:Thing?
> That doesn't seem right.
>
> My guess is that there is some other bit of software that explicitly
> puts in these extra type links.
>
>
> One reason that I ask is that I would like to not have these extra type
> links, so that I can run some experiments.
>
It is easier to have them in the db and one can programmatically remove
them if needed. This way for example we can request all persons and the
query is answered without reasoning
> It would also have been nice to have the provenance information show which
> mapping was used.
>
We have some sort of provenance in the .nq files, like where in wikipage
this triple was extracted
Best,
Dimitris
>
>
> peter
>
> PS: [1] doesn't talk about how these extra type links are generated, as
> far as I can tell. The only relevant portion of the paper is on page 4: "A
> mapping assigns a type from the DBpedia ontology to the entities that are
> described by the corresponding infobox."
>
>
> On Apr 14, 2014, at 12:49 AM, Alexandru Todor <to...@inf.fu-berlin.de>
> wrote:
>
> Hi Peter,
>
> The triples come from the mappings. The mappings come from the mappings
> wiki.
>
> The article about Airstotle uses the Infobox Philisopher. This infobox
> is Mapped to the class Philisopher, which is a subClassOf Person which is a
> subClassOf Agent which is a subClassOf owl:Thing. To better understand what
> I mean, have a quick look at the DBpedia Overview Article [1], it should
> clarify how the mappings and the extraction better.
>
> Cheers,
> Alexandru
>
>
> [1] http://blog.dbpedia.org/2013/06/24/swj-article/
>
>
> On Mon, Apr 14, 2014 at 2:38 AM, Patel-Schneider, Peter <
> peter.patel-schnei...@nuance.com> wrote:
>
>> Hi:
>>
>> I'm trying to figure out where the rdf:type triples for superclasses come
>> from.
>>
>> For example, the type triples for Aristotle are:
>>
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://dbpedia.org/ontology/Philosopher> .
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://dbpedia.org/ontology/Person> .
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://xmlns.com/foaf/0.1/Person> .
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://www.w3.org/2002/07/owl#Thing> .
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://schema.org/Person> .
>> <http://dbpedia.org/resource/Aristotle> <
>> http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
>> http://dbpedia.org/ontology/Agent> .
>>
>> Where do the triples for foaf:Person, schema.org:Person, Agent, and
>> owl:Thing come from?
>>
>>
>> peter
>>
>>
>>
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>
>
>
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--
Kontokostas Dimitris
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