Property talk:P2687

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JPNO
Japanese National Bibliography Number of the National Diet Library

Associated item	National Diet Library (Q477675)
Applicable "stated in" value	Japanese National Bibliography (Q111191774)
Data type	External identifier
Corresponding template	Template:JPNO (Q14398398)
Domain	According to this template: work (Q386724) (see Wikidata:Books task force#Edition item properties) According to statements in the property: work (Q386724) When possible, data should only be stored as statements
Allowed values	\d{8}
Example	The Master of Go (1973) (Q15231929) → 22015095 (RDF) no label (Q11231780) → 01008609 (RDF) Bessatsu Takarajima (Q11396662) → 00029379 (RDF)
Source	NDL Search
Formatter URL	https://id.ndl.go.jp/jpno/$1
Related to country	Japan (Q17) (See 145 others)
See also	NDL Bib ID (P1054), NDL Authority ID (P349), NDL Persistent ID (P9836)
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/P2687 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 7,261 Main statement 6,153 out of 6,204,911 (0% complete) 84.7% of uses Qualifier 3 <0.1% of uses Reference 1,105 15.2% of uses
Search for values

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Type “work (Q386724)”: item must contain property “instance of (P31)” with classes “work (Q386724)” or their subclasses (defined using subclass of (P279)). (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/P2687#Type Q386724, 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/P2687#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/P2687#Unique value, SPARQL (every item), SPARQL (by value)

Format “\d{8}”: 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/P2687#Format, 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/P2687#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/P2687#Scope, SPARQL

Conflicts with “instance of (P31): human (Q5)”: this property must not be used with the listed properties and values. (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/P2687#Conflicts with P31, search, SPARQL

Item “instance of (P31)”: Items with this property should also have “instance of (P31)”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P2687#Item P31, hourly updated report, search, SPARQL

Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia category (Q4167836), Wikimedia list article (Q13406463), Wikimedia template (Q11266439), Wikimedia module (Q15184295)”: this property must not be used with the listed properties and values. (Help)

List of violations of this constraint: Database reports/Constraint violations/P2687#Conflicts with P31, hourly updated report, SPARQL