Property talk:P1181

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numeric value
numerical value of a number, a mathematical constant, or a physical constant

Description	Numerical value of a number (Q11563), a mathematical constant (Q186509) or a physical constant (Q173227)
Represents	numeric value (Q10388960), quantity value (Q110597311)
Data type	Quantity
Template parameter	many
Domain	According to this template: number (Q11563), physical constant (Q173227) According to statements in the property: number (Q11563), physical constant (Q173227), unit of measurement (Q47574), aspect ratio (Q1441762), country population (Q62944360), quantity (Q309314), numerical digit (Q82990), combination (Q202805), unit prefix (Q15132612), numeral (Q63116), Xbox Achievement (Q123348893), numeric writing system (Q140774) or astronomical constant (Q3556678) When possible, data should only be stored as statements
Allowed values	real or integer numbers, positive or negative - real number (Q12916) (note: this should be moved to the property statements)
Example	1 (Q199) → 1 pi (Q167) → 3.1415926535898 speed of light in vacuum (Q2111) → 299,792,458 metre per second molar gas constant (Q182333) → 8.3144598 joule per mole kelvin M82589933 (Q67171811) → not applicable 10^123 (Q18449905) → 1E123
See also	route number (P1671), road number (P1824), house number (P670)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Minimum and maximum Items with highest numeric value Items with lowest numeric value User:Laboramus/Units/P1181 (Units used) Database reports/Constraint violations/P1181 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 138,694 Main statement 138,357 99.8% of uses Qualifier 332 0.2% of uses Reference 5 <0.1% of uses

[create Create a translatable help page (preferably in English) for this property to be included here]

Type “number (Q11563), physical constant (Q173227), unit of measurement (Q47574), aspect ratio (Q1441762), country population (Q62944360), quantity (Q309314), numerical digit (Q82990), combination (Q202805), unit prefix (Q15132612), numeral (Q63116), Xbox Achievement (Q123348893), numeric writing system (Q140774), astronomical constant (Q3556678)”: item must contain property “instance of (P31), subclass of (P279)” with classes “number (Q11563), physical constant (Q173227), unit of measurement (Q47574), aspect ratio (Q1441762), country population (Q62944360), quantity (Q309314), numerical digit (Q82990), combination (Q202805), unit prefix (Q15132612), numeral (Q63116), Xbox Achievement (Q123348893), numeric writing system (Q140774), astronomical constant (Q3556678)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1181#Type Q11563, Q173227, Q47574, Q1441762, Q62944360, Q309314, Q82990, Q202805, Q15132612, Q63116, Q123348893, Q140774, Q3556678, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1181#Entity types

Scope is as main value (Q54828448), as qualifier (Q54828449): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1181#Scope, SPARQL

This property is being used by: ca:Plantilla:Infotaula nombre eu:Txantiloi:Unitate infotaula commons:Template:Number cat ga:Teimpléad:WD Bosca Sonraí Uimhir Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

physical constant

This property is intended to be used with mathematical constants. What about physical constants? Can we extend the scope of this property so that it can be used on mathematical and physical cosntants? --Pasleim (talk) 11:46, 5 October 2015 (UTC)

 Support --Tobias1984 (talk) 19:36, 2 November 2015 (UTC)

Tobias1984
Snipre
Physikerwelt
Pamputt
Petermahlzahn
Jibe-b
Restu20
Daniel Mietchen
TomT0m
ArthurPSmith
Mu301
Sarilho1
SR5
DavRosen
Danmichaelo
Ptolusque
PhilMINT
Malore
Thibdx
Ranjithsiji
Niko.georgiev
Simon Villeneuve
Toni 001
Marc André Miron
DePiep
RShigapov
CarlFriedberg
Crocodilecoup
Mkomboti
Amorenobr (talk) 01:27, 3 August 2022 (UTC)
Valverde667 (talk) 16:07, 4 August 2022 (UTC)
fgnievinski

Notified participants of WikiProject Physics

Saehrimnir
Leyo
Snipre
Dcirovic
Walkerma
Egon Willighagen
Denise Slenter
Daniel Mietchen
Kopiersperre
Emily Temple-Wood
Pablo Busatto (Almondega)
Antony Williams (EPA)
TomT0m
Wostr
Devon Fyson
User:DePiep
User:DavRosen
Benjaminabel
99of9
Kubaello
Fractaler
Sebotic
Netha
Hugo
Samuel Clark
Tris T7
Leiem
Christianhauck
SCIdude
Binter
Photocyte
Robert Giessmann
Cord Wiljes
Adriano Rutz
Jonathan Bisson
GrndStt
Ameisenigel
Charles Tapley Hoyt
ChemHobby
Peter Murray-Rust
Erfurth
TiagoLubiana

Notified participants of WikiProject Chemistry

Arlo Barnes Athulvis Buller1 cdo256 Cekli829 Harlock81 Jc3s5h JenlovesbigD J. N. Squire Jura1 Kepler-1229b LiMr Manlleus Meodudlye, with only limited amount of time to spend in the foreseable future. Mike Peel mu301 (mikeu) Paperoastro Path slopu Ptolusque Romuald 2 Sarilho1 Sherman Alexander Shisma Simon Villeneuve SM5POR Tom.Reding VIGNERON Wallacegromit1 - generally like to add ground and space observatory instrument data Ysogo Jck1337

Notified participants of WikiProject Astronomy

 Support of course, no big deal. author  TomT0m / talk page 19:42, 2 November 2015 (UTC)

No opposition Snipre (talk) 20:28, 2 November 2015 (UTC)

 Support There is a real need for this - however, just to be fair it's possible these should be two distinct properties, as a constraint check for being dimensionless (no units) as it has now does seem useful. I know there's some overlap, but just to be fair I'm adding a ping: ArthurPSmith (talk) 22:16, 2 November 2015 (UTC)

Opensofias
Tobias1984
Arthur Rubin
Cuvwb
TomT0m
Physikerwelt
Lymantria
Bigbossfarin
Infovarius
Helder
PhilMINT
Malore
Lore.mazza51
Wikisaurus
The Anome
The-erinaceous-one
Daniel Mietchen
Haansn08
Xenmorpha
John Samuel
Jeremy Dover
Toni 001
Bocardodarapti
Duckmather
HTinC23
fgnievinski

Notified participants of WikiProject Mathematics

@Jura1: - also pinging Jura1 as user responsible for adding the dimension constraint... ArthurPSmith (talk) 00:23, 3 November 2015 (UTC)

 Support --Almondega (talk) 23:22, 2 November 2015 (UTC)

 Support--►Cekli829 18:20, 3 November 2015 (UTC)

So it looks like we don't have any disagreement to make this change. I think I can do the edit - here's what I would do, if anybody wants to review this change before it is made:

• Change the description to read "numerical value of a number (e.g. 1), a mathematical constant (e.g. pi), or a physical constant (e.g. speed of light)"
• Also change the Data type to "Quantity" (this has replaced Number anyway)
• Change the Domain statement as with the description to add physical constant
• Remove the "Dimensionless quantity" constraint
• Modify the "Type" constraint to add physical constant (Q173227) as allowed class

does this seem right? ArthurPSmith (talk) 21:17, 3 November 2015 (UTC)

Ok - the above changes have been made - except data type can't be changed (it's embedded in the property definition?) Also I added unit of measurement also as an allowed type as this seems to be frequently used. ArthurPSmith (talk) 19:20, 4 November 2015 (UTC)

Can you add an example that involves uncertainties like the Planck constant

$h=6.626\ 070\ 040(81)\times 10^{-34}{\text{ J⋅s}}=4.135\ 667\ 662(25)\times 10^{-15}{\text{ eV⋅s}}?$ --Physikerwelt (talk) 11:32, 8 November 2015 (UTC)

Ok, I added an example with uncertainty - however it's not showing up quite right on the template page above, it doesn't seem to be pulling in the uncertainty or units. Note that there's also a problem with display of small numbers right now in wikidata (for example the Planck constant example) - see this phabricator request. ArthurPSmith (talk) 19:11, 10 November 2015 (UTC)

physiological condition

Which property should be used for physiological condition (Q7189713)-like data? See, e.g., ventricular-brain ratio (Q17141282). Is this out of scope for numeric value (P1181)? — Finn Årup Nielsen (fnielsen) (talk) 02:59, 18 January 2016 (UTC)

Unique value constraint

I find it strange that we put down a "unique value constraint" on this property. As the constraint violation report shows, there are a lot of real numbers which are the values of different physical or mathematical constants in different contexts. Should we remove the constraint? Deryck Chan (talk) 17:26, 23 April 2018 (UTC)

But we see all "violations" (actually, exceptions) and can fix any wrong non-uniqueness (there were such cases some time ago). Let it stay. --Infovarius (talk) 10:46, 22 August 2018 (UTC)

Maximum value

Apparently, there is a maximum value around 9E124, see Help:Statements#Quantitative_values.

For a way to indicate that the value is known, but exceeds it, see Q28753965#P1181 using value known, but too large for datatype (Q54767019).
--- Jura 19:28, 5 June 2018 (UTC)

also for unit prefixes

Looks like we're also using this for unit prefixes (Q15132612) like kilo (Q107428). Makes sense. Not sure if the description needs updating to reflect this, or if an example would be useful. I updated the constraint. —Scs (talk) 12:38, 9 May 2020 (UTC)

Numerical value of convergent series

An instance of convergent series (Q1211057) should be allowed to have a numeric value (P1181), which is the number to which it converges. Helder 13:06, 7 July 2020 (UTC)

Allow links of a specific (large) number

Maybe it should allow links of a specific (large) number like the Largest known prime number item. Thingofme (talk) 15:46, 18 February 2023 (UTC)