Property talk:P9621

Documentation

• Start a query
• Current uses
• Statistics by class
• String length
• List of qualifiers
• Count

Treccani's Enciclopedia della Matematica ID
identifier for a topic in Treccani's Enciclopedia della Matematica, an Italian encyclopedia regarding mathematics

Associated item	Institute of the Italian Encyclopaedia (Q3803714)
Applicable "stated in" value	Enciclopedia della Matematica (Q80076368)
Data type	External identifier
Allowed values	[a-z]+(?:-[a-z]+)*(?:_res\-[0-9a-f]{8}(?:\-[0-9a-f]{4}){3}\-[0-9a-f]{12})?
Example	Apollonius of Perga (Q180109) → apollonio-di-perge Burali-Forti paradox (Q1010269) → paradosso-di-burali-forti Lusin's theorem (Q1361393) → teorema-di-luzin
Source	https://www.treccani.it/enciclopedia/elenco-opere/Enciclopedia_della_Matematica
Formatter URL	https://www.treccani.it/enciclopedia/$1_(Enciclopedia-della-Matematica)
Related to country	Italy (Q38) (See 396 others)
See also	Treccani ID (P3365)
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/P9621 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 1,407 Main statement 1,400 out of 7,870 (18% complete) 99.5% of uses Qualifier 3 0.2% of uses Reference 4 0.3% of uses
Search for values

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

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/P9621#Unique value, SPARQL (every item), SPARQL (by value)

Single best value: this property generally contains a single value. If there are several, one would have preferred rank (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/P9621#single best value, SPARQL

Format “[a-z]+(-[a-z]+)*(_res\-[0-9a-f]{8}(\-[0-9a-f]{4}){3}\-[0-9a-f]{12})?”: 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/P9621#Format, SPARQL

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/P9621#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/P9621#Entity types

Label required in languages: it: Entities using this property should have labels in one of the following languages: it (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/P9621#Label in 'it' language, search, SPARQL

Pattern ^(.*)_+(?:\(Enciclopedia[_\-]della[_\-]Matematica\))?$ will be automatically replaced to \1. Testing: TODO list