Talk:Q28732711
Autodescription — physical substance (Q28732711)
- Useful links:
- View it! – Images depicting the item on Commons
- Report on constraint conformation of “physical substance” claims and statements. Constraints report for items data
- Parent classes (classes of items which contain this one item)
- Subclasses (classes which contain special kinds of items of this class)
- ⟨
physical substance⟩ on wikidata tree visualisation (external tool)(depth=1) - Generic queries for classes
Union and disjoint queries
- Instances of physical substance (Q28732711)
that are instances of two (or more) of the classes: [1] - Instances of physical substance (Q28732711) that are instances of none of the classes non-material physical substance (Q28728673) and matter (Q35758) [2]
- See also
- This documentation is generated using
{{Item documentation}}.
P2313[edit]
Is not appropriate here as qualifier, we need another property. d1g (talk) 11:00, 25 September 2017 (UTC)
Superset[edit]
physical substance (Q28732711) is entity (Q35120) and concrete object (Q4406616) (is object (Q488383) is entity (Q35120)). --Fractaler (talk) 11:20, 20 November 2017 (UTC)
- Agreed and added statements to physical substance (Q28732711). MovGP0 (talk) 07:41, 29 May 2018 (UTC)
- @MovGP0: 'is' not always equals instance of (P31) in Wikidata. --Infovarius (talk) 10:31, 30 May 2018 (UTC)
Definition[edit]
It's bit unclear what this item is supposed to represent, but I think it's any "substance" composed of fundamental particles, including the individual particles themselves (since massless particles such as photons travel at the speed of light and don't really form "substances".) So I removed the statement that this item is a subclass of substance (Q27166344), since otherwise you get a subclass loop (see Wikidata:Project_chat#how_bad_are_loops_in_the_subclass-of_hierarchy?. Ghouston (talk) 22:58, 30 March 2020 (UTC)
Relation to matter[edit]
General discussion is at Talk:Q185674. Infovarius (talk) 07:34, 28 July 2023 (UTC)