Property talk:P2409

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NII article ID
identifier for an article in scholarly literature databases operated by National Institute of Informatics (NII), Japan

Represents	NII article ID (Q118976435)
Associated item	National Institute of Informatics (Q4346622)
Applicable "stated in" value	CiNii Articles (Q115921507), CiNii Dissertations (Q107529324)
Data type	External identifier
Corresponding template	Template:NAID (Q14937536)
Domain	According to this template: academic articles According to statements in the property: work (Q386724) When possible, data should only be stored as statements
Allowed values	[1-9][0-9]{10,11}
Example	Trisomy 6q syndrome: a case with a << de novo >> 6q23 tandem duplication. (Q38492499) → 10016210320 (RDF) Duct-Taping Databases, or How to Use Fragmentary Online Data for Researching “Japanese” Videogames (Q109831158) → 130007941216 (RDF) Isolation of pluripotent adult stem cells discovered from tissues derived from all three germ layers (Q118674871) → 500000543019 (RDF)
Source	https://ci.nii.ac.jp/
Formatter URL	https://ci.nii.ac.jp/naid/$1
See also	NACSIS-CAT author ID (P271), NACSIS-CAT bibliography ID (P1739), NII author ID (P4787), CiNii Research ID (P11496)
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/P2409 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 7,883 Main statement 7,788 98.8% of uses Qualifier 3 <0.1% of uses Reference 92 1.2% 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/P2409#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/P2409#Scope, SPARQL

Format “[1-9][0-9]{10,11}”: 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/P2409#Format, 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/P2409#Unique value, hourly updated report, 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/P2409#Single value, 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/P2409#Item P31, hourly updated report, search, SPARQL

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/P2409#Type Q386724, 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/P2409#Conflicts with P31, 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/P2409#Conflicts with P31, hourly updated report, SPARQL

Conflicts with “NII author ID (P4787)”: 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/P2409#Conflicts with P4787, search, SPARQL

Item “CiNii Research ID (P11496)”: Items with this property should also have “CiNii Research ID (P11496)”. (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/P2409#Item P11496, search, SPARQL

Pattern ^((?:DA|DB)\d{7}[\dX])$ will be automatically replaced to \1 and moved to NACSIS-CAT author ID (P271) property. Testing: TODO list

Pattern ^(1\d{18})$ will be automatically replaced to \1 and moved to CiNii Research ID (P11496) property. Testing: TODO list

Note on CiNii Articles/Dissertations/Research

Please note that NII article ID (P2409) is ID for both CiNii Articles (CiNii Articles (Q115921507)), which is now defunct and redirected to CiNii Research (CiNii Research (Q115920372)), and CiNii Dissertations (CiNii Dissertations (Q107529324)), which is still alive but also included in CiNii Research.

• IDs for Article entries are redirected to CiNii Research, but IDs for Dissertation entries (beginning with 5) are not.
• No more NII article ID (P2409) is assigned to new Article entries in CiNii Research, but new Dissertation entries will have NII article ID (P2409).
• Don't add claims based on CiNii Research; such claims may be for CiNii Research ID (P11496).

--Mzaki (talk) 12:56, 25 May 2023 (UTC) fixed --Mzaki (talk) 14:03, 25 May 2023 (UTC)