Il 23/05/2011 17:44, Sarasi Lalithsena ha scritto:
> Hi,
>
> I want to extract all properties from the DBpedia data set and I tried
> the following query but it did not work. I even tried to limit the
> results but still it did not work as well.
>
> select distinct ?property where {
> ?s ?property ?o .
> }
>
> I have the properties defined in the DBpedia Ontology but I am
> wondering whether their can be some other properties not defined in
> the ontology. If somebody can help me it would be a great help.
Hi Sarasi,
probably you will never get the expected results from that query. The
main problem is that you are asking DBpedia SPARQL endpoint to perform a
graph matching on all the 672 million triples in DBpedia, and then to
select distinct property.
This is too onerous, and the transaction will always time out.
>
> Thank You
> Best Regards
> Sarasi Lalithsena
best regards,
roberto
--
Roberto Mirizzi
http://sisinflab.poliba.it/mirizzi
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