Property talk:P4440

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Biblioteca Nacional de México ID
authority control identifier used at the Biblioteca Nacional de México

Associated item	National Library of Mexico (Q5495070)
Has quality	zero-padding (Q61057261)
Data type	External identifier
Allowed values	\d{9}
Example	Octavio Paz (Q46739) → 000000001 National Library of Mexico (Q5495070) → 000054308 National Aeronautics and Space Administration (Q23548) → 000085039
Formatter URL	http://catalogo.iib.unam.mx/F/?func=direct&local_base=BNM10&doc_number=$1
Related to country	Mexico (Q96) (See 20 others)
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 Database reports/Constraint violations/P4440 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 603 Main statement 599 99.3% of uses Qualifier 3 0.5% of uses Reference 1 0.2% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Format “\d{9}”: 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/P4440#Format, SPARQL

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/P4440#Single value, 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/P4440#Unique value, SPARQL (every item), SPARQL (by value)

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/P4440#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/P4440#Scope, SPARQL

Pattern ^(\d{4})$ will be automatically replaced to 00000\1. Testing: TODO list

Pattern ^(\d{5})$ will be automatically replaced to 0000\1. Testing: TODO list

Pattern ^(\d{6})$ will be automatically replaced to 000\1. Testing: TODO list

Pattern ^(\d{7})$ will be automatically replaced to 00\1. Testing: TODO list

Pattern ^(\d{8})$ will be automatically replaced to 0\1. Testing: TODO list

Regarding my changes to the constraints and formatter URL

As the old formatter URL did not work anymore for the provided examples, I took the liberty to standardize the formatter URL like those of other properties where there is authority information provided by an aleph instance. I also set the property constraint to the standard 9 digit value, as this is used by the alpeh system aswell. The first example works again: [1]. Since there are only 299 uses, it is a matter of just a few days to adapt the current values. --Sotho Tal Ker (talk) 04:16, 8 March 2020 (UTC)