Property talk:P4215

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nLab ID
name of a page in nLab wiki

Description	name of a page in nLab
Applicable "stated in" value	nLab (Q6954693)
Data type	External identifier
Template parameter	w:Template:Nlab
Domain	topic in maths (note: this should be moved to the property statements)
Allowed values	[\p{L}\d=–?,.^'\- ()î’]+
Example	category of sets (Q2518298) → Set total order (Q369377) → total order Atiyah–Singer index theorem (Q755991) → Atiyah-Singer index theorem Martin Hyland (Q6775742) → Martin Hyland
Source	https://ncatlab.org/nlab/show/HomePage
External links	Use in sister projects: [ar] • [de] • [en] • [es] • [fr] • [he] • [it] • [ja] • [ko] • [nl] • [pl] • [pt] • [ru] • [sv] • [vi] • [zh] • [commons] • [species] • [wd] • [en.wikt] • [fr.wikt].
Formatter URL	https://ncatlab.org/nlab/show/$1
Robot and gadget jobs	Yes
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 external identifier 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 Mix'n'match (Report) Database reports/Constraint violations/P4215 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 4,241 Main statement 4,234 out of 18,182 (23% complete) 99.8% of uses Qualifier 4 <0.1% of uses Reference 3 <0.1% of uses
Search for values

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

Format “[\p{L}\d=–?,.^'\- ()î’]+”: value must be formatted using this pattern (PCRE syntax). (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/P4215#Format, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (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/P4215#Unique value, SPARQL (every item), SPARQL (by value)

Single value: this property generally contains a single value. (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/P4215#Single value, 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/P4215#Entity types

Scope is as main value (Q54828448), as reference (Q54828450): 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/P4215#Scope, SPARQL

Label required in languages: en: Entities using this property should have labels in one of the following languages: en (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/P4215#Label in 'en' language, search, SPARQL

Description required in languages: en: Entities using this property should have descriptions in one of the following languages: en (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/P4215#Description in 'en' language, search, SPARQL

Format: space or plus

If one enters plus, then the link has %2B in it, and if one enters space, the link has plus, so one should probably use space, and it is easier anyway. I changed the regexes and examples to deprecate plus, nobody minds? Wikisaurus (talk) 16:29, 13 December 2019 (UTC)

Interwiki prefix "nlab:"

nlab: is now available. See Q6954693#P6720 and m:Talk:Interwiki_map#nLab.--- Jura 10:19, 20 May 2021 (UTC)