A little messier than you might like, but the following query does what
you ask:
http://tinyurl.com/zxlsyk5
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX entity: <http://www.wikidata.org/entity/>
PREFIX p: <http://www.wikidata.org/prop/direct/>
SELECT ?propUrl ?propLabel ?valUrl ?valLabel ?picture
WHERE {
hint:Query hint:optimizer 'None' .
{ BIND(entity:Q42 AS ?valUrl) .
BIND("N/A" AS ?propUrl ) .
BIND("identity"@en AS ?propLabel ) .
}
UNION
{ entity:Q42 ?propUrl ?valUrl .
?property ?ref ?propUrl .
?property a wikibase:Property .
?property rdfs:label ?propLabel
}
?valUrl rdfs:label ?valLabel
FILTER (LANG(?valLabel) = 'en') .
OPTIONAL{
?valUrl p:P18 ?picture .
}
FILTER (lang(?propLabel) = 'en' )
}
ORDER BY ?propUrl ?valUrl LIMIT 200
On 06/04/2016 19:38, [email protected] wrote:
I have the following SPARQL query that returns the items related to Q42.
To avoid the compute time of making an additional query I would like to
tweak this query to return one additional row that contains the
information about Q42 itself using the same columns. Is there a special
property that indicates a self relationship, or any other way of
accomplishing the above in one query?
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX entity: <http://www.wikidata.org/entity/>
PREFIX p: <http://www.wikidata.org/prop/direct/>
SELECT ?propUrl ?propLabel ?valUrl ?valLabel ?picture
WHERE {
hint:Query hint:optimizer 'None' .
entity:Q42 ?propUrl ?valUrl .
?valUrl rdfs:label ?valLabel
FILTER (LANG(?valLabel) = 'en') .
?property ?ref ?propUrl .
?property a wikibase:Property .
?property rdfs:label ?propLabel
OPTIONAL{
?valUrl p:P18 ?picture .
}
FILTER (lang(?propLabel) = 'en' )
}
ORDER BY ?propUrl ?valUrl LIMIT 200
Please advise,
James Weaver
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https://lists.wikimedia.org/mailman/listinfo/wikidata
