Hi Richard,
This is exactly what I want! thank you so much.
by the way, how the SPQRQL end point resolve "?s a <
http://dbpedia.org/ontology/Company>"? is it trying to find the triples with
p as
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
and o as
<http://dbpedia.org/ontology/Company>
?
thanks
Kenny
On Thu, Oct 22, 2009 at 8:59 PM, Richard Cyganiak <[email protected]>wrote:
>
> On 22 Oct 2009, at 12:57, Kenny Guan wrote:
>
> Hi Pierre,
>>
>> thanks for your reply. Maybe I didn't describe my question clearly. the
>> attributes of Company I want is like "founder", "year of foundation" etc.
>>
>> A more specific example, an instance of Company like, Apple, has an
>> attribute "founder" with value of "Steve Jobs".
>>
>
> Try something like:
>
> SELECT DISTINCT ?p WHERE {
> ?s a <http://dbpedia.org/ontology/Company> .
> ?s ?p ?o .
> }
>
> This gets all resources of type Company, then finds all triples that have
> this resource as subject, and returns the predicate of these triples. The
> DISTINCT removes duplicates.
>
> Optionally you might want to also put this into the angle brackets, after
> the last dot:
>
> FILTER (REGEX(?p, 'ontology'))
>
> This removes all properties that do not have "ontology" in the URI, giving
> you only the properties defined by the ontology, and skipping general
> infobox properties.
>
> Hope that's what you're after.
>
> Best,
> Richard
>
>
>
>> does this make any sense?
>>
>> Many thanks
>> Kenny
>>
>>
>> On Thu, Oct 22, 2009 at 4:42 PM, Pierre De Wilde <[email protected]
>> >wrote:
>>
>> SELECT * WHERE { {?s ?p ?o. FILTER(?s IN (<
>>> http://dbpedia.org/ontology/Company>))} }
>>>
>>> 2009/10/22 Kenny Guan <[email protected]>
>>>
>>> Hey,
>>>>
>>>> I am doing some work on semantic search and I may want to use dbpedia as
>>>> seed data. The thing I want to do now is, given a dbpedia ontology
>>>> class,
>>>> say COMPANY, i want to get all attributes of COMPANY.
>>>>
>>>> I see there are 170+ classes and 900+ attributes in dbpedia ontology.
>>>> For
>>>> each object/instance, its type/class is specified in "Ontology type"
>>>> dataset, its attributes are specified in "Ontology infoboxes" dataset.
>>>> But
>>>> seems no dataset directly specifies the attributes of a particular
>>>> class,
>>>> right?
>>>>
>>>> if it is, how to write a SPARQL script to get attributes of COMPANY? I
>>>> have never written a SPARQL, hope to start with this one. can someone
>>>> give
>>>> some help?
>>>>
>>>> Thanks in advance
>>>> Kenny
>>>>
>>>>
>>>>
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