[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Daniel_Mietchen updated the task description. TASK DETAIL https://phabricator.wikimedia.org/T267782 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Daniel_Mietchen Cc: Lucas_Werkmeister_WMDE, Aklapper, Jelabra, ericP, Andrawaag, Invadibot,

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Lucas_Werkmeister_WMDE added a comment. In T267782#6645978 , @ericP wrote: > I'll weigh in on 341 after we reach consensus here on whether our (Andra, Labra, DanBri, myself, ...) interpretation is correct that, at least for

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

ericP added a comment. I'll weigh in on 341 after we reach consensus here on whether our (Andra, Labra, DanBri, myself, ...) interpretation is correct that, at least for http://www.wikidata.org/entity/Q313093.ttl , a blank node represents the unknown value in

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Lucas_Werkmeister_WMDE added a comment. But the ultimate motivation for that task is to get rid of //all// blank nodes, wherever they appear, because the new query service updater can’t deal with them. If you say that we have to use blank nodes for something, then we have a big problem –

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

ericP added a comment. Oops, sorry, I failed to notice that. I propose splitting the issue because the considerations are different and I expect them to have different outcomes. bnodes for OWL constructs is mandated by the OWL specification. bnodes for missing and unknown values is a

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Lucas_Werkmeister_WMDE added a comment. T244341 also includes the use of blank nodes for unknown values. TASK DETAIL https://phabricator.wikimedia.org/T267782 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

ericP added a comment. I don't believe it's the same. T244341: Stop using blank nodes for encoding SomeValue and OWL constraints in WDQS is about the use of blank nodes in the representation of some OWL expressions. The OWL spec is very clear

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Lucas_Werkmeister_WMDE added a comment. I’m not sure what this task is about… it sounds like it might be covered by T244341: Stop using blank nodes for encoding SomeValue and OWL constraints in WDQS ? TASK DETAIL

[Wikidata-bugs] [Maniphest] T267782: Incorrect use of blank node to represent unknown and no value in Wikidata

Andrawaag created this task. Andrawaag added a project: Wikidata. Restricted Application added a subscriber: Aklapper. TASK DESCRIPTION During the [[ https://github.com/elixir-europe/BioHackathon-projects-2020/tree/master/projects/35 | where we are working on subsetting wikidata, we ran