View source for Testwiki:Property proposal/Base Units

=== {{TranslateThis | anchor = en
| en = Base Units
| zh = 基本单位
<!-- |xx = property names in some other languages -->
}} ===
{{Property proposal
|status			= 12571
|description		= {{TranslateThis
 | en = Property that lists the different units that a unit is derived from, would be useful to add a qualifier for the exponent of each unit ie. {{Q|182429}} → {{Q|11574}} → -1.
<!-- | xx = descriptions in other languages -->
 }}
|subject item           = <!-- item corresponding to the concept represented by the property, if applicable; example: item child (Q29514218) for property child (P40) -->
|infobox parameter	= <!-- Wikipedia infobox parameters, if any; ex: "population" in [[:en:template:infobox settlement]] -->
|datatype		= item
|domain			= {{Q|47574}}
|allowed values		= {{Statement||P31|Q47574}}
|allowed units          = <!-- units that are allowed for values of this property if the datatype is quantity -->
|source			= <!-- external reference URL, Wikipedia list article, etc. -->
<!-- you should provide 3 examples at least-->
|example 1		= 
{{Q|182429}} → {{Q|11573}}<br>
{{Q|182429}} → {{Q|11574}}
|example 2		=
{{Q|16859309}} → {{Q|3710}}<br>
{{Q|16859309}} → {{Q|100995}}
|example 3		= 
{{Q|25517}} → {{Q|11573}}
|example 4		= 
{{Q|12438}} → {{Q|11570}}<br>
{{Q|12438}} → {{Q|11573}}<br>
{{Q|12438}} → {{Q|11574}}
<!-- if convenient, include more examples by following the same pattern:
|example ...		=  {{Q|1}} → value
-->
|planned use            = Add better definitions of units and relations to other units
|number of ids          = <!-- for identifiers, the number of ids available from the source -->
|expected completeness  = <!-- for identifiers, the coverage we can hope for in Wikidata: Q21873886 (always incomplete) or Q21873974 (eventually complete) -->
|formatter URL		= <!-- for identifiers, URL pattern where $1 replaces the value -->
|implied notability = <!-- for identifiers, use either {{Q|62589316}} if the existence of this identifier on an item suggests notability or {{Q|62589320}} if not -->
|external links         = <!-- for identifiers, search string to pass to sister projects' Special:LinkSearch pages, e.g. example.com  -->
|see also               = {{P|5061}}, {{P|2370}}, {{P|2442}}
|robot and gadget jobs	= <!-- Should or are bots or gadgets doing any task with this? (Checking other properties for consistency, collecting data, etc.) -->
|subpage		= Base Units
|topic			= generic
|applicable stated in value = <!-- If the proposed property (for an external identifier) is to be used in references, create an item for its database or website suitable as value for "stated in" (P248) and add this here. It is added to properties with P9073 on creation. The item used as value can be the same as used with "subject item". -->
|single value constraint      = <!-- yes - if the property should get a single value constraint, otherwise no text needed -->
|distinct values constraint   = <!-- yes - if the property should get a distinct values constraint, otherwise no text needed -->
|Wikidata project  = <!-- item of the Wikidata project (see [[Wikidata:WikiProjects]]) that's related to the property -->
}}

====Motivation====

Units are important in many fields and it is important to have some kind of structure to help add relationships between units. The more structured knowledge there is for units the more useful quantities can become and be better used together.  -[[User:I is chan|I is chan]] ([[User talk:I is chan|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 01:54, 29 October 2022 (UTC)

===={{int:Talk}}====

* {{comment}} It seems like {{P|P527}} is currently sometimes used for that, e.g. {{statement|Q182429|P527|Q11573}}. What is your motivation for introducing a new property instead of using {{P|P527}}? --[[User:Push-f|Push-f]] ([[User talk:Push-f|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 02:32, 30 October 2022 (UTC)

:: {{P|P527}} doesn't seem like a proper use case for this because for {{statement|Q182429|P527|Q11574}} technically {{Q|11574}} is being removed from the unit rather than being "a part of" it, perhaps it could have a negative {{P|1114}} quantifier? -[[User:I is chan|I is chan]] ([[User talk:I is chan|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 12:51, 30 October 2022 (UTC)
:::I think {{P|P527}} fits fine. Units that are composed of several other units are also called "compound units". E.g. [https://wtmaths.com/compound_units.html] says "speed is a compound unit as it is defined using both distance and time". So the other units are all part of the definition. --[[User:Push-f|Push-f]] ([[User talk:Push-f|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 20:42, 1 November 2022 (UTC)

* {{S}} {{P|P527}} shouldn't be used for this. -[[User:Wd-Ryan|wd-Ryan]] ([[User_talk:Wd-Ryan|Talk]]/[[Special:Contributions/Wd-Ryan|Edits]]) 15:59, 30 October 2022 (UTC)
*:Why not? [[User:ChristianKl|<span style="color:#0000EE;">'''ChristianKl'''</span>]] ❪[[User talk:ChristianKl|✉]]❫ 20:19, 1 November 2022 (UTC)
*::{{re|Wd-Ryan}} can you explain why you think it should not be used like this? [[User:ChristianKl|<span style="color:#0000EE;">'''ChristianKl'''</span>]] ❪[[User talk:ChristianKl|✉]]❫ 10:35, 28 May 2023 (UTC)
*:::{{ping|ChristianKl}}, would you like to give your opinion? {{re|Wd-Ryan}} could you please clarify the comments above. Regards, [[User:ZI Jony|<span style="color:#8B0000">'''ZI Jony'''</span>]] [[User talk:ZI Jony|<sup><span style="color:Green"><i>(Talk)</i></span></sup>]] 06:22, 25 January 2024 (UTC)
*::::I don't believe that these should be considered parts. For instance, parts of a day could be hours, minutes, etc.. If that is true, parts of ''kilometers per second'' would be meters per second, etc.. I think Dexxor's concern is valid anyway. -[[User:Wd-Ryan|wd-Ryan]] ([[User_talk:Wd-Ryan|Talk]]/[[Special:Contributions/Wd-Ryan|Edits]]) 22:29, 25 January 2024 (UTC)

* {{comment}} What should a qualifier stating the exponent of the unit be called? -[[User:I is chan|I is chan]] ([[User talk:I is chan|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 19:20, 30 October 2022 (UTC)
* {{Pro}} --[[User:Gymnicus|Gymnicus]] ([[User talk:Gymnicus|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 08:25, 10 May 2023 (UTC)
* {{s}}, an important property for science.--[[User:Arbnos|Arbnos]] ([[User talk:Arbnos|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 22:01, 11 January 2024 (UTC)

*{{oppose}} in its current form. This property is not well-defined. For example, the unit {{Q|Q163343}} has several possible definitions. You could avoid this by only allowing the [[w:SI base unit|SI base units]] as values, but then it would be essentially the same as {{P|P4020}}. It also wouldn't allow you to establish a link between {{Q|Q16859309}} and {{Q|Q3710}}. I think a better alternative is {{Statement||P138|Q3710}} or something akin to:
{{Statement+
|indent=5em
|navbar=no
|reference=close
|P={{P-|P2534}}
|V=<math>\text{T}= \frac{\text{V}\cdot{\text{s}}}{\text{m}^2}= \frac{\text{N}}{\text{A}\cdot\text{m}}</math>
}}
{{Statement+
|indent=5em
|navbar=no
|reference=close
|P={{P-|P7235}}
|V=<math>\text{V}</math>
|qp={{P-|P9758}}
|qv={{Q-|Q25250}}
|V2=<math>\text{m}</math>
|V2.qp={{P-|P9758}}
|V2.qv={{Q-|Q11573}}
|V3=and so on…
}}
::[[User:Dexxor|Dexxor]] ([[User talk:Dexxor|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 17:24, 13 January 2024 (UTC)
::{{P|P4020}} is not of type item, so not the same. [[User:Midleading|Midleading]] ([[User talk:Midleading|<span class="signature-talk">{{int:Talkpagelinktext}}</span>]]) 04:49, 20 February 2024 (UTC)
* {{re|I is chan|Push-f|Wd-Ryan|Gymnicus|Arbnos|Midleading}} {{done}} as {{P|12571}}. Regards, [[User:ZI Jony|<span style="color:#8B0000">'''ZI Jony'''</span>]] [[User talk:ZI Jony|<sup><span style="color:Green"><i>(Talk)</i></span></sup>]] 06:01, 4 April 2024 (UTC)