Property talk:P111

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measured physical quantity
value of a physical property expressed as number multiplied by a unit
Descriptionphysical property measured by an unit
Representsunit of measurement (Q47574), physical quantity (Q107715)
Data typeItem
According to this template: unit of measurement (Q47574)
According to statements in the property:
unit of measurement (Q47574)
When possible, data should only be stored as statements
Allowed valuesphysical quantity (Q107715) (note: this should be moved to the property statements)
Exampleminute (Q7727)time (Q11471)
kelvin (Q11579)temperature (Q11466)
hertz (Q39369)frequency (Q11652)
henry (Q163354)inductance (Q177897)
candela (Q83216)luminous intensity (Q104831)
mole (Q41509)amount of substance (Q104946)
siemens (Q169893)electrical conductance (Q309017)
lumen (Q484092)luminous flux (Q107780)
steradian (Q177612)solid angle (Q208476)
katal (Q208634)catalysis (Q82264)
gray (Q190095)absorbed dose (Q215313)
Tracking: usageCategory:Pages using Wikidata property P111 (Q26250022)
See alsomeasures (P2575)
Proposal discussion[not applicable Proposal discussion]
Current uses1,804
Search for values
[create Create a translatable help page (preferably in English) for this property to be included here]
  Type “unit of measurement (Q47574): element must contain property “instance of (P31)” with classes “unit of measurement (Q47574)” or their subclasses (defined using subclass of (P279)). (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P111#type Q47574, SPARQL, SPARQL (new)
  Value type “individual quantity (Q71550118): This property should use items as value that contain property “subclass of (P279)”. On these, the value for subclass of (P279) should be an item that uses subclass of (P279) with value individual quantity (Q71550118) (or a subclass thereof). (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P111#Value type Q71550118, SPARQL, SPARQL (new)


Can I change the label to "measured physical quantity" (or just "measures") ? "Physical quantity" sounds rather ambiguous. --Zolo (talk) 08:45, 19 February 2013 (UTC)

I changed for de, en and fr. --Zolo (talk) 17:03, 19 February 2013 (UTC)


I've run into this talkpage because find obvious that domain should be different. I see that P111 is redundant for units like kilowatt hour (Q182098) because they already have mention of quantity in instance of (P31) unit of energy (Q2916980). I propose to use current property only for subclasses of unit of measurement (Q47574), for example in unit of energy (Q2916980). --Infovarius (talk) 06:44, 24 April 2014 (UTC)

@Infovarius: Not all units have a class of the form "unit of <some physical quantity>". I would argue that those classes could be eliminated (not saying they should), given that their members can be derived (that is, queried) because each unit should have a value for measured physical quantity (P111). Toni 001 (talk) 12:57, 20 October 2019 (UTC)

"measured physical quantity"?Edit

It now says "measured physical quantity". But it can also be a defined quantity. Alas. Actually, a better wording is: "value of a quantity" (that 'value' per SI is defined as: number × unit). All in all, the Wikidata handling of physical quantity and SI definition concepts is substandard. -DePiep (talk) 22:39, 23 December 2018 (UTC)

Measurement devicesEdit

A measuring instrument (Q2041172) measures a physical quantity (Q107715): For instance, a tide gauge (Q686697) measures height (Q208826) (of the tide). Given that the name of this property is currently "measured physical quantity" I propose to add measuring instrument (Q2041172) to the domain. Toni 001 (talk) 20:17, 18 October 2019 (UTC)

What about measures (P2575)? --Infovarius (talk) 19:39, 20 October 2019 (UTC)
@Infovarius: That's it, thanks. Toni 001 (talk) 19:39, 23 October 2019 (UTC)
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