Colin Maudry ColinMaudry

SPARQL Queries (with cURL command) on Wikidata

This gist resulted to be just the spark for a proper article, and won't be maintained here anymore.

The SPARQL endpoint is http://wdqs-beta.wmflabs.org/bigdata/namespace/wdq/sparql and it has a Web form to fire queries. However http://www.wikidata.org/prop/direct/P31 ("instance of") tells you what the entity is.

The repository doesn't have named graphs, or at least the SPARQL endpoint rejects graph queries. The classes of entities (rdf:type) are not described in the repository.

To find the HTML page of an entity (such as https://www.wikidata.org/entity/Q866405), simply replace /entity/ with /wiki/.

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "dtd/technicalContent/dtd/topic.dtd">
	<topic class=" topic/topic " id="mytopic">
	<title class=" topic/title">Stairway to heaven</title>
	<body class=" topic/body">
	<p class=" topic/p">There's a lady who's sure, <b outputclass="strong" class=" topic/ph hi-d/b">all</b> that glitters is gold.</p>
	</body>
	</topic>

	#Selects the first 20 types of entities encountered:
	select distinct ?type where {
	?thing <http://www.wikidata.org/prop/direct/P31> ?type
	}
	limit 20

	<#columnAline1> rdf:type ex:MP ;
	rdf:type foaf:Person ;
	foaf:name “Bernard Accoyer” .