How to get the Wikidata ID (Q…) using just a label? - sparql

Question

Is there any way to get the Wikidata Q identifier of an entity using just the label as a string?
For example, "Java":
Q251
I want to search only the English labels.

Answer 1

PREFIX wd: <http://www.wikidata.org/entity/>
SELECT DISTINCT ?qid
WHERE {
# make input string into a language-tagged string
BIND( STRLANG("Java", "en") AS ?label ) .
# search all items that have this languaged-tagged string as label
?item rdfs:label ?label .
# extract the last path segment of the URI
BIND(STRAFTER(STR(?item), STR(wd:)) AS ?qid) .
}
If you can append #en to the input string ("Java"#en), you can use:
PREFIX wd: <http://www.wikidata.org/entity/>
SELECT DISTINCT ?qid
WHERE {
?item rdfs:label "Java"#en .
BIND(STRAFTER(STR(?item), STR(wd:)) AS ?qid) .
}
If you are fine with the URI (e.g., http://www.wikidata.org/entity/Q251) instead of the QID (e.g., Q251) as result, you can use:
SELECT DISTINCT ?item
WHERE {
?item rdfs:label "Java"#en .
}
If you want to ignore case, you can use UCASE or LCASE in a FILTER.