Wikidata:Property proposal/secondary topic
|Description||topic of a work, but not the main topic (see also P921: main subject)|
|Example 2||general relativity|
|Planned use||I will add a topic of my research monograph.|
|Expected completeness||eventually complete (Q21873974)|
|See also||main subject|
Property:P921 is vastly not enough to describe topics of works.
We need also to create another property (I do not propose it, because it would refer to this property that yet has no property ID) to be a superclass of both this property and P921. VictorPorton (talk) 06:22, 26 February 2021 (UTC)
For example, my book "D, the Best Programming Language, for Former Python Developers" (not described at WikiData) could have Property:Q319268 as its main subject and PQ79872 (PQ79872) and several others as values of this property.