Property talk:P2355

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UNESCO Atlas of the World's Languages in Danger ID
identifier for endangered languages listed by UNESCO

Applicable "stated in" value	Red Book of Endangered Languages (Q925553)
Data type	External identifier
Domain	According to this template: Languages ( items with instance of (P31) language (Q34770) ) According to statements in the property: languoid (Q17376908) When possible, data should only be stored as statements
Allowed values	[1-9]\d{0,3} (numeric string, 1 to 4 digits)
Example	Gazi (Q5529130) → 2061 Punjabi (Q58635) → not applicable
Source	http://www.unesco.org/languages-atlas/
Formatter URL	https://www.unesco.org/languages-atlas/en/atlasmap/language-id-$1.html
See also	UNESCO language status (P1999)
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 Items with deprecated claims Deprecated statements with this identifier as a source Usage history (total) Usage history (main statement) Chart by item creation date Mix'n'match (Report) Database reports/Constraint violations/P2355 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 2,720 Main statement 2,699 99.2% of uses Qualifier 1 <0.1% of uses Reference 20 0.7% of uses
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[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)

List of violations of this constraint: Database reports/Constraint violations/P2355#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/P2355#Single value, SPARQL

Item “UNESCO language status (P1999)”: Items with this property should also have “UNESCO language status (P1999)”. (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/P2355#Item P1999, search, SPARQL

Format “[1-9]\d{0,3}|”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2355#Format, hourly updated report, SPARQL

Type “languoid (Q17376908)”: item must contain property “instance of (P31)” with classes “languoid (Q17376908)” 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/P2355#Type Q17376908, 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/P2355#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/P2355#Scope, SPARQL

This property is being used by:

• ca:Plantilla:Infotaula de llengua, ca:Plantilla:Infotaula llengua
• vec:Modeło:Infobox de Łéngua
• ga:Teimpléad:WD Bosca Sonraí Teanga

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Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Constraint

I've found at least 50 instances where languages have more than one UNESCO AWLD ID, generally for dispersed ethic communities now in different countries. Some of them have as many as four IDs - see Garifuna (Q35490). Should the single-item constraint be removed? - PKM (talk) 21:06, 9 June 2017 (UTC)

PKM, I know we discussed this elsewhere, I'm repeating here for reference. These are most probably dialects, once the entire catalogue has been imported through Mix n' Match we can run a query for items with multiple IDs to find where dialects have been added to the main language item. --John Cummings (talk) 21:47, 24 June 2017 (UTC)

New website

The World Atlas of Languages website has changed its internal structure. Thus all numeric identifiers do not work anymore. The World Atlas of Languages now use plain text identifier for its language. See for example Ukrainian Sign Language. I think we should create a new property to handle this new URL format, migrate all identifier to the new property and then declare this property as obsolete. What do you think? Pamputt (talk) 07:04, 5 July 2023 (UTC)

If the situation is as you describe, a new property sounds like a reasonable approach. But unfortunately https://en.wal.unesco.org/languages/ukrainian-sign-language does not even open for me. Has the whole atlas disappeared since 2023? --Marsupium (talk) 08:37, 29 August 2025 (UTC)

I have found an archived page with the newer plain text ID for Ukrainian Sign Language (Q10322106) at https://webarchive.unesco.org/web/20250310040109/https://en.wal.unesco.org/index.php/countries/ukraine/languages/ukrainian-sign-language. --Marsupium (talk) 09:08, 29 August 2025 (UTC)