Wikidata:Property proposal/Reason for unknown/no value

PROPERTY NAME IN English edit

Originally proposed at Wikidata:Property proposal/Generic

Not done

Description	Rationale for why there is no_value or unknown_value for any field. They are mostly used for place_of_burial or date_of_death or date_of_birth
Data type	Item
Example 1	Q0 → value
Example 2	MISSING
Example 3	MISSING
See also	list of Wikidata reasons for deprecation (Q52105174) criterion used (P1013): property by which a distinction or classification is made has cause (P828): underlying cause, thing that ultimately resulted in this effect object has role (P3831): (qualifier) role or generic identity of the value of a statement ("object") in the context of that statement; for the role of the item the statement is on ("subject"), use P2868

Motivation edit

We need a reason why there is no value so the next person does not waste time looking for it. I need a little help formatting this proposal. RAN (talk) 23:57, 18 November 2019 (UTC)[reply]

Discussion edit

Comment In general, I think the criteria are more similar to custom values than to ranks. Accordingly, I'd use similar qualifiers (e.g. criterion used (P1013), P828, P3831).

I'd rather add some description to the property itself. The reasons are likely always the same for a property.

For P569/P570 mentioned above, I'm not sure if it's a good idea to mix novalue/unknown. These properties would use novalue only for immortals and unknown is fairly rare: generally at least the century is known. --- Jura 09:53, 19 November 2019 (UTC)[reply]