Lucas_Werkmeister_WMDE added subscribers: Denny, mkroetzsch. Lucas_Werkmeister_WMDE added a comment.
CCing @mkroetzsch and @Denny for input on the RDF model – they probably have some use cases in mind. > queries based on the number of unknown values on a particular property? Examples would help here I think. Note that people who are counting unknown values with `wdt:P106 ?blank` already only count //best-rank// statements; and if they count all statements via `p:P106 ?statement. ?statement ps:P106 ?blank`, then they should still get the correct count. So I’m not sure how bad the collapsing of unknown values would be in practice. The “find entities which share the same value” example is a very good point, though. That might be dangerous. > I did some tests and isBlank is a lot faster (I suppose because this information is inlined as opposed to the IRI that has to be fetched from its dictionary). If we go with an `wikibase:isUnknownValue` function, then its implementation might also be able to be very efficient, also looking only at the inlined part of the information? Not sure. (I’m assuming that these `wdunk:` nodes would be inlined as a special “unknown value” type and the “entity ID + UUID” part, similar to how entity IDs, I believe, are inlined as their type plus the numeric ID part. Hopefully the UUID isn’t too long to be inlined? But maybe even if it is, the `wikibase:isUnknownValue` function wouldn’t need to load the not-inlined part? I don’t know enough Blazegraph internals.) TASK DETAIL https://phabricator.wikimedia.org/T244341 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Lucas_Werkmeister_WMDE Cc: mkroetzsch, Denny, Lucas_Werkmeister_WMDE, Aklapper, dcausse, darthmon_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Smalyshev, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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