[Wikidata-bugs] [Maniphest] T259088: Add WhatLinksHere (inverse properties) section to the Wikidata item pages

[Reedy]

Reedy renamed this task from "Add WhatLinksHere (inverse properties) section to 
the WikiData item pages" to "Add WhatLinksHere (inverse properties) section to 
the Wikidata item pages".

TASK DETAIL
  https://phabricator.wikimedia.org/T259088

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To: Reedy
Cc: SJu, Aklapper, Akuckartz, darthmon_wmde, Nandana, Lahi, Gq86, 
GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, 
Wikidata-bugs, aude, Mbch331
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[Wikidata-bugs] [Maniphest] T259088: Add WhatLinksHere (inverse properties) section to the Wikidata item pages

[Reedy]

Reedy added a project: MediaWiki-extensions-WikibaseRepository.

TASK DETAIL
  https://phabricator.wikimedia.org/T259088

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To: Reedy
Cc: SJu, Aklapper, Akuckartz, darthmon_wmde, Nandana, lucamauri, Lahi, Gq86, 
GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, 
Wikidata-bugs, aude, Mbch331
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[Wikidata-bugs] [Maniphest] T259088: Add WhatLinksHere (inverse properties) section to the WikiData item pages

[DannyS712]

DannyS712 changed the subtype of this task from "Task" to "Feature Request".

TASK DETAIL
  https://phabricator.wikimedia.org/T259088

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To: DannyS712
Cc: SJu, Aklapper, Akuckartz, darthmon_wmde, Nandana, Lahi, Gq86, 
GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, 
Wikidata-bugs, aude, Mbch331
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[Wikidata-bugs] [Maniphest] T259088: Add WhatLinksHere (inverse properties) section to the WikiData item pages

[SJu]

SJu created this task.
SJu added a project: Wikidata.
Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION
  Properties have a fundamental system defect from the beginning. While 
Wikidata interproject links (as well as classic category wikitags in other 
projects) works really bidirectionally (reciprocally, complementarily), 
properties linking an another item work only in one direction. The inverse 
property needs to be created manually, So far, this defect has only been 
compensated for by the fact that there is a system of warnings that encourage 
this manual creation of inverse properties. But there is no indication on the 
target item page that any link points to that page and that the inverse 
property is missing.
  
  This problem was reported e.g. in T51165 
. Related problems and some ways how 
to solve and treat them were suggested e.g. in T209559 
. A concept of "virtual properties" 
can be acceptable until we have fully-fledged two-way properties.
  
  The first step can be to **add a section of "virtual properties" to the 
Wikidata item pages.**  This section would be in principle the function 
"WhatLinksHere", but specially modified: the links should be sorted by the 
calling property, and the format of the list should be as similar as possible 
to the format of the previous section of properties. Thus, **these property 
links should be presented as virtual inverse properties**.
  
  Such "virtual properties" should be invocable and linkable (from infoboxes 
etc.) in the same way as "real" (directly stated) properties.
  
  The prospective target state should be that the properties referring from one 
item to an another item work realistically as bidirectional, ie that their 
editing or monitoring of their history can be performed in exactly the same way 
from both sides. Thus, it would probably be appropriate for individual 
connections not to be an integral part of one of the item page and its editing 
history, but to be managed in an autonomous indexed database. Btw. category 
tags in other projects can be managed in a similar way and both systems 
(category links and property links) can be prospectively directed to their 
mutual compatibility.

TASK DETAIL
  https://phabricator.wikimedia.org/T259088

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: SJu
Cc: SJu, Aklapper, Akuckartz, darthmon_wmde, Nandana, Lahi, Gq86, 
GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, 
Wikidata-bugs, aude, Mbch331
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