Wikidata:Property proposal/QUDT quantity kind ID

Description	identifier for a physical, chemical, ... quantity in the QUDT ontology
Data type	External identifier
Domain	subclass of (P279) → individual quantity (Q71550118)
Allowed values	"[a-zA-Z_\-]+"
Example 1	mass (Q11423) → Mass
Example 2	area (Q11500) → Area
Example 3	specific energy (Q3023293) → SpecificEnergy
Source	http://www.qudt.org/doc/2020/06/DOC_VOCAB-QUANTITY-KINDS-ALL-v2.1.html
Planned use	improve consistency of and between quantity and unit ontologies
Number of IDs in source	282
Expected completeness	eventually complete (Q21873974)
Formatter URL	http://qudt.org/vocab/quantitykind/$1
See also	QUDT unit ID (P2968), Wolfram Language quantity ID (P7431), measured physical quantity (P111)

About Wikidata's model of quantities and units and how it relates to QUDT:

Physical and other quantities like area, electric current, partial pressure, ... are subclass of (P279) individual quantity (Q71550118). Those are also called kind of quantity.
Units like square metre, ampere, pascal, ... are instance of (P31) unit of measurement (Q47574).
Units are linked to quantities using measured physical quantity (P111). A quantity can also be linked to a single unit (that is, the reverse direction) using recommended unit of measurement (P8111) (only with reference to a standard).
QUDT units are linked using qudt:hasQuantityKind to QUDT quantity kinds.

Support Seems reasonable to link these. ArthurPSmith (talk) 20:31, 19 June 2020 (UTC)[reply]
Support so this would complement QUDT unit ID (P2968), correct? Will you also map qudt:applicableUnit somehow in Wikidata? --Hannes Röst (talk) 19:36, 24 June 2020 (UTC)[reply]
Yes, it's a complement to QUDT unit ID (P2968). Similar to how Wolfram Language unit code (P7007) and Wolfram Language quantity ID (P7431) are complementary. qudt:applicableUnit seems to be similar to recommended unit of measurement (P8111). Toni 001 (talk) 10:22, 27 June 2020 (UTC)[reply]

@Toni 001: I think actually qudt:applicableUnit is different from recommended unit of measurement (P8111) as here recommended unit of measurement (P8111) represents "unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)" while qudt:applicableUnit lists *all* applicable units (see http://qudt.org/vocab/quantitykind/Mass). But maybe its better to model this with instance of (P31) unit of mass (Q3647172) as for example in long ton (Q667419). Best --Hannes Röst (talk) 13:18, 29 June 2020 (UTC)[reply]

@Hannes Röst: Indeed. Now that I've looked through some examples, this property seems to be closer to the inverse of our measured physical quantity (P111). Toni 001 (talk) 15:41, 29 June 2020 (UTC)[reply]

Done at QUDT quantity kind ID (P8393) --SilentSpike (talk) 10:13, 28 June 2020 (UTC)[reply]