Wikidata:Requests for comment/Unknown Value vs Null Value

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An editor has requested the community to provide input on "Unknown Value vs Null Value" via the Requests for comment (RFC) process. This is the discussion page regarding the issue.

If you have an opinion regarding this issue, feel free to comment below. Thank you!

Wikidata does not appear to have a simple manner in which to indicate a value is unknown/unknowable. Ideally the entity

wdt:Q24238356 Unknown Value

should be easily accessible (without knowing its id) from the "add value" interface of the web based property editor.

Distinguish this from a NULL value as:

  • NULL: This field has not been filled or is not present
  • UNKNOWN: This field is intentionally blank, because there is no reliable data on the matter.