- From: Cifuentes, Francisco <fcifuentes@bcn.cl>
- Date: Thu, 22 Jan 2015 11:40:46 -0300
- To: Semantic Web <semantic-web@w3.org>, public-lod public <public-lod@w3.org>
Complementary:
SELECT count (*)
WHERE {
?s ?p ?o .
}
It is useful to know the number of triples in the sparql endpoint.
Regards.
On Thu, 22 Jan 2015 15:27:24 +0100
Bernard Vatant <bernard.vatant@mondeca.com> wrote:
> Hi Juan
>
> My strategy is as following
>
> Q1 : Which types are used?
> SELECT DISTINCT ?type
> WHERE {?x rdf:type ?type}
>
> Q2 : Which predicates are used?
> SELECT DISTINCT ?p
> WHERE {?x ?p ?o}
>
> Q3 : Which predicates are used by instances of the type :foo found
>in Q1
> I'm interested in
> SELECT DISTINCT ?p
> WHERE {?x ?p :foo}
>
>
> 2015-01-22 15:09 GMT+01:00 Juan Sequeda <juanfederico@gmail.com>:
>
>> Assume you are given a URL for a SPARQL endpoint. You have no idea
>>what
>> data is being exposed.
>>
>> What do you do to explore that endpoint? What queries do you write?
>>
>> Juan Sequeda
>> +1-575-SEQ-UEDA
>> www.juansequeda.com
>>
>
>
>
> --
>
> *Bernard Vatant*
> Vocabularies & Data Engineering
> Tel : + 33 (0)9 71 48 84 59
> Skype : bernard.vatant
> http://google.com/+BernardVatant
> --------------------------------------------------------
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> www.mondeca.com
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><http://twitter.com/#%21/mondecanews>
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______________________
Francisco Cifuentes Silva
Sistemas y Servicios de Información en Red
Biblioteca del Congreso Nacional de Chile
Tel: +56 032 2263969
Received on Friday, 23 January 2015 09:08:18 UTC