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Project:SPARQL/examples: Difference between revisions
→Locations of BN excavations
| Line 1,617: | Line 1,617: | ||
WHERE { | WHERE { | ||
?item bnwdt:P12 bnwd:Q38 . | ?item bnwdt:P12 bnwd:Q38 . | ||
{ | |||
?item bnwdt:P2 ?location . # item has property P2 location | ?item bnwdt:P2 ?location . # item has property P2 location | ||
| Line 1,635: | Line 1,637: | ||
?wikidata wdt:P625 ?wd_geo1 . | ?wikidata wdt:P625 ?wd_geo1 . | ||
} # /wikidata service | } # /wikidata service | ||
} | |||
} | } | ||
union | |||
{ | |||
filter not exists {?item bnwdt:P2 ?location . } # item doesn't have property P2 location | |||
optional { | |||
?item bnwdt:P117 ?wikidata_id . # but has wikidata id | |||
bind(iri(concat("http://www.wikidata.org/entity/", str(?wikidata_id))) as ?wikidata) . | |||
SERVICE <https://query.wikidata.org/sparql> { | |||
?wikidata wdt:P625 ?wd_geo1 . | |||
} # /wikidata service | |||
} | |||
} | |||
BIND(COALESCE(?wd_geo1, ?wd_geo2) AS ?wd_geo). # if geo1 available use that, then try geo2 | BIND(COALESCE(?wd_geo1, ?wd_geo2) AS ?wd_geo). # if geo1 available use that, then try geo2 | ||