Property talk:P2067
Latest comment: 1 year ago by Vicarage in topic Are citations really needed
Documentation
mass
mass (in colloquial usage also known as weight) of the item
mass (in colloquial usage also known as weight) of the item
[create Create a translatable help page (preferably in English) for this property to be included here]
Units: “electronvolt per speed of light squared (Q108888186), pound (Q100995), solar mass (Q180892), dalton (Q483261), yottagram (Q613726), Jupiter mass (Q651336), long ton (Q667419), Earth mass (Q681996), centner (Q940052), megagram (Q11776930), kilogram (Q11570), gram (Q41803), ounce (Q48013), tonne (Q191118), kilodalton (Q14623804), kiloelectronvolt per speed of light squared (Q108888198), megaelectronvolt per speed of light squared (Q108888206), gigaelectronvolt per speed of light squared (Q108888224), ton (Q11247037), milligram (Q3241121), zettagram (Q14754979), exagram (Q2655272), teragram (Q1770733), petagram (Q2612219), stone (Q1131660), short ton (Q469356), ronnagram (Q115359865), quettagram (Q115359866), gram per mole (Q28924752), carat (Q261247)”: value unit must be one of listed. (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: Hello Kitty (Q191794), Basshunter (Q383541)List of violations of this constraint: Database reports/Constraint violations/P2067#Units
Citation needed: the property must have at least one reference (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: International Prototype of the Kilogram (Q3738063), Basshunter (Q383541)List of violations of this constraint: Database reports/Constraint violations/P2067#citation needed
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/P2067#Scope, 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/P2067#Entity types
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This property is being used by:
Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.) |
Unsuitable weight for human
Person with weight and bigger than 300kg (Help)
Violations query:
List of this constraint violations: [[Wikidata:Database reports/Complex constraint violations/P2067#Unsuitable weight for human|Database reports/Complex constraint violations/P2067#Unsuitable weight for human]]
Person with weight and bigger than 300kg (Help)
Violations query:
SELECT DISTINCT ?item WHERE { ?item wdt:P31 wd:Q5; p:P2067/psn:P2067/wikibase:quantityAmount ?amount; p:P2067/psn:P2067/wikibase:quantityUnit wd:Q11570. FILTER( ?amount > 300 ) }List of this constraint violations: [[Wikidata:Database reports/Complex constraint violations/P2067#Unsuitable weight for human|Database reports/Complex constraint violations/P2067#Unsuitable weight for human]]
compare mass born and mass adult
(Help)
Violations query:
List of this constraint violations: Database reports/Complex constraint violations/P2067#compare mass born and mass adult
(Help)
Violations query:
SELECT DISTINCT ?item ?massAdult ?massBorn { ?item p:P2067 [psn:P2067 ?nodeMassAdult; pq:P642 wd:Q78101716; ]. ?item p:P2067 [psn:P2067 ?nodeMassBorn; pq:P642 wd:Q4128476; ]. ?nodeMassAdult wikibase:quantityAmount ?massAdult. ?nodeMassBorn wikibase:quantityAmount ?massBorn. FILTER (?massAdult < (?massBorn * 1.2)) }List of this constraint violations: Database reports/Complex constraint violations/P2067#compare mass born and mass adult
max value
(Help)
Violations query:
List of this constraint violations: Database reports/Complex constraint violations/P2067#max value
(Help)
Violations query:
SELECT ?item ?mass { ?item p:P2067 [psn:P2067 ?nodeMass; ]. ?nodeMass wikibase:quantityAmount ?mass. FILTER (?mass > 100000000000000000000000000000000000000000000000000000). }List of this constraint violations: Database reports/Complex constraint violations/P2067#max value
taxon max value
(Help)
Violations query:
List of this constraint violations: Database reports/Complex constraint violations/P2067#taxon max value
(Help)
Violations query:
SELECT ?item ?mass { ?item wdt:P31 wd:Q16521. ?item p:P2067 [psn:P2067 ?nodeMass; ]. ?nodeMass wikibase:quantityAmount ?mass. FILTER (?mass > 136000). }List of this constraint violations: Database reports/Complex constraint violations/P2067#taxon max value
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This property is being used by: Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.) |
People's weight edit
Can we use this property to show people's weight? --Stryn (talk) 17:22, 14 September 2015 (UTC)
- @Stryn: I think it can be used for people. Maybe it would need a point-in-time qualifier for objects that can change their mass. We could also add some aliases like 'weight as an adult'? --Tobias1984 (talk) 09:56, 15 September 2015 (UTC)
- I have modified the page accordingly. If it's a bad idea just cancel. Thierry Caro (talk) 11:07, 16 September 2015 (UTC)
- Kind of odd that we use a generic property for a fairly clearly described usecase and make specific mass properties for hot air at take-off. --- Jura 16:08, 27 September 2015 (UTC)
- People's weight truly has to have a point in time, especially as it predominantly relates to sports' people at the time of their sporting career. Can the constraints be set that where human that it needs a point in time qualifier?
- Added "point in time" for humans. Jeblad (talk) 09:47, 9 May 2019 (UTC)
- People's weight truly has to have a point in time, especially as it predominantly relates to sports' people at the time of their sporting career. Can the constraints be set that where human that it needs a point in time qualifier?
- Kind of odd that we use a generic property for a fairly clearly described usecase and make specific mass properties for hot air at take-off. --- Jura 16:08, 27 September 2015 (UTC)
- I have modified the page accordingly. If it's a bad idea just cancel. Thierry Caro (talk) 11:07, 16 September 2015 (UTC)
FYI, there was a discussion about mass (P2067), WD:BLP and WikiProject Properties/Wikidata properties likely to be challenged on the Project chat. –84.46.52.151 07:12, 20 February 2020 (UTC)
mass is not weight! edit
mass is not weight, weight is a force! mass units are grams, force units are newtons. – The preceding unsigned comment was added by Yossi87 (talk • contribs).
- Scientifically speaking you're absolutely right. However, Wikidata isn't a scientific database, but a database for everyone and in common language mass is often referred to as weight. So that's why weight is mentioned as an alias, so people that don't know the difference can still find this property. Mbch331 (talk) 16:46, 15 March 2016 (UTC)
- A lot of measured physical properties aren't modelled properly. Some of them are quite hard to model correctly, and some types of models doesn't make much sense to most people. At some point it could be wise to complement or augment the model. Jeblad (talk) 09:44, 9 May 2019 (UTC)
Megaelectronvolt edit
I've just created megaelectronvolt (Q72081071) which is incredibly useful when discussing masses/energies of baryons. Plenty of data, like that in Review of Particle Physics (Q56810046) is presented in those units. Can we make it an accepted unit? - Sarilho1 (talk) 14:40, 23 October 2019 (UTC)
- @Sarilho1: see the opposite request: Talk:Q83327. I suppose User:Toni 001 disagrees with you. --Infovarius (talk) 19:35, 10 March 2020 (UTC)
- I created some mass units like megaelectronvolt per speed of light squared (Q108888206), which will allow proper comparison with other values. There are about 40 values which currently use electronvolt and similar which we can now update. Toni 001 (talk) 07:30, 14 October 2021 (UTC)
Relative and so dimensionless edit
With chemical element (Q11344), it is main practice to note the mass as relative atomic mass (Q41377), symbol Ar. The "relative" part says that its mass is compared to a predefined standard mass (actually that of 1/12 of the carbon-12 atom). So the value is determined as:
- Ar(Element) = mass(Element) / (1/12 * mass(12C)).
This has the consequence that, since the same unit is above and below the /-devider, they are nullified (to be "1") and so the Ar value is dimensionless quantity (Q126818).
This dimensionless unit is used in standard atomic weight (Q28912964) by Commission on Isotopic Abundances and Atomic Weights (Q15647945), (International Union of Pure and Applied Chemistry (Q33438)). Some 80 chemical element (Q11344)s have their mass defined this way.[1] Therefor I propose that the Unit constraint be extended to allow "dimensionless" (=no unit). -DePiep (talk) 20:00, 19 October 2020 (UTC)
- All units used for a given property should have consistent dimension. If we want to store dimensionless values then we could propose a different property. Toni 001 (talk) 07:49, 10 June 2021 (UTC)
Related "Project chat" discussion. edit
I have created a thread, Wikidata:Project chat#atomic mess, to discuss the misuse of this property to describe atomic mass as alluded to in the above section, #Relative and so dimensionless, started by User:DePiep. Jc3s5h (talk) 12:13, 9 June 2021 (UTC)
Are citations really needed edit
It seems overly fussy to demand a citation for the mass of an object. Very few people will jump through the hoops to provide one.Vicarage (talk) 22:03, 17 August 2022 (UTC)