Hello,
I'm trying to retrieve a list of open source mobile applications using
the Wikidata Query Service. After identifying the item for K9-Mail
(Q14565723), I can see that it has "instance of" (P31) set to both
"free software" (Q341) and "mobile app" (Q620615). I hence derived
the
following SPARQL query, to retrieve similar items:
SELECT ?software ?softwareLabel
WHERE
{
?software wdt:P31 wd:Q341, wd:Q620615.
SERVICE wikibase:label { bd:serviceParam wikibase:language
"[AUTO_LANGUAGE]". }
}
It returns three results, but to my suprise, it does not return the
item for K9-Mail. Given that the query is such a simple one, I'm
wondering what I am doing wrong here? Or is something else possibly not
working correctly?
Thanks for your help,
Sebastian