Property talk:P9836

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NDL Persistent ID
identifier for a work in the National Diet Library Digital Collections

Associated item	National Diet Library (Q477675)
Applicable "stated in" value	NDL Digital Collections (Q117959850)
Data type	External identifier
Corresponding template	Template:NDLDC (Q23011683)
Domain	scholarly article (Q13442814), scientific journal (Q5633421), book (Q571), article (Q191067), literary work (Q7725634) or publication (Q732577)
Allowed values	[1-9]\d*(?:/[1-9]\d*(?:/[1-9]\d*)?)?
Example	Deep-sea nematodes off Mindanao Island, the Philippines I. Draconematidae (Q107397646) → 10855631 (RDF) Tamiji Kawamura 1883-1964 (Q107396565) → 10854755 (RDF) Helminth fauna of bats in Japan III (Q107396672) → 10854861 (RDF)
Source	国立国会図書館デジタルコレクション
Formatter URL	https://dl.ndl.go.jp/pid/$1
Related to country	Japan (Q17) (See 145 others)
See also	NDL Bib ID (P1054), JPNO (P2687), NDL Authority ID (P349)
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/P9836 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 5,410 Main statement 4,908 out of 5,240,000 (0% complete) 90.7% of uses Qualifier 3 <0.1% of uses Reference 499 9.2% of uses
Search for values

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

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/P9836#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/P9836#Scope, SPARQL

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/P9836#single best value, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

List of violations of this constraint: Database reports/Constraint violations/P9836#Unique value, hourly updated report, SPARQL (every item), SPARQL (by value)

Format “[1-9]\d*”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P9836#Format, hourly updated report, SPARQL

Format “(?!\d+/).*”: 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/P9836#Format, SPARQL

Format “[1-9]\d*(?:/[1-9]\d*(?:/[1-9]\d*)?)?”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P9836#Format, hourly updated report, SPARQL

Type “scholarly article (Q13442814), scientific journal (Q5633421), book (Q571), article (Q191067), literary work (Q7725634), publication (Q732577)”: item must contain property “instance of (P31), subclass of (P279)” with classes “scholarly article (Q13442814), scientific journal (Q5633421), book (Q571), article (Q191067), literary work (Q7725634), publication (Q732577)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P9836#Type Q13442814, Q5633421, Q571, Q191067, Q7725634, Q732577, hourly updated report, SPARQL

individual pages

Hello, as in the taxon name (P225) reference on Myoxus lineatus (Q122492110), you can link to a particular page of the NDL persistent id item (in this instance, 1680203/1/9). Is it best to keep the format constraint on this property, and end up with the constraint violation warning? Thank you, Maculosae tegmine lyncis (talk) 05:26, 14 September 2023 (UTC)

The NDL Persistent ID represents "Digital content in the NDL Digital Collections"[1], not the page nor the part in that, so the property should be defined as such. However, the extended, slash-separated form is used as a part of URL, and explicitly presented on the web site for linking purpose. This form would be useful when used as a reference statement in order to link to confined location within the digital content. So I relaxed the format constraint for reference statements using constraint checked on references (Q46466805) & constraint checked on main value (Q46466787). Please note that the extended form should not be used as main statements, because it is not covered in the official document. Mzaki (talk) 12:16, 10 February 2024 (UTC)