Smalyshev added a comment.
Blanks are used as representation of "unknown value" in Wikibase. Also, they are used (completely unrelatedly) in implementation of OWL class that describes "no value" properties (as "no value" is not a value, it is implemented with `a` predicate and a class instead of usual property predicate). The class definition itself is useful only for the tools that actually understand OWL semantics. Most tools that query WDQS do not. TASK DETAIL https://phabricator.wikimedia.org/T239414 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Smalyshev Cc: Smalyshev, Lucas_Werkmeister_WMDE, Igorkim78, dcausse, Aklapper, Hook696, Daryl-TTMG, RomaAmorRoma, 0010318400, E.S.A-Sheild, darthmon_wmde, Meekrab2012, joker88john, DannyS712, CucyNoiD, Nandana, NebulousIris, Gaboe420, Versusxo, Majesticalreaper22, Giuliamocci, Adrian1985, Cpaulf30, Lahi, Gq86, Af420, Darkminds3113, Bsandipan, Lordiis, GoranSMilovanovic, Adik2382, Th3d3v1ls, Ramalepe, Liugev6, QZanden, EBjune, merbst, LawExplorer, WSH1906, Lewizho99, Maathavan, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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