Property talk:P229

The property value will be transformed to uppercase automatically. Testing: TODO list

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IATA airline designator
two-character identifier for an airline

Description	IATA two-character code for identifying airlines - airline code (Q741701). For airports, rather use IATA airport code (P238).
Represents	IATA airline code (Q11976628)
Data type	String
Template parameter	"IATA" in en:Template:Infobox Airline
Domain	According to this template: instances of airline (Q46970) According to statements in the property: airline (Q46970) or railway company (Q249556) When possible, data should only be stored as statements
Allowed values	According to this template: 2 alphanumeric characters (uppercase) According to statements in the property: [A-Z0-9]{2} When possible, data should only be stored as statements
Example	Malaysia Airlines (Q308952) → MH Turkish Airlines (Q4548) → TK Blue Wings (Q685605) → QW
Source	airline code (Q741701) (note: this information should be moved to a property statement; use property source website for the property (P1896))
Tracking: usage	Category:Pages using Wikidata property P229 (Q28039792)
See also	IATA airport code (P238), ICAO airline designator (P230), flight number (P3090), callsign of airline (P432)
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 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 Mix'n'match (Report) Database reports/Constraint violations/P229 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 2,847 Main statement 2,843 99.9% of uses Qualifier 3 0.1% of uses Reference 1 <0.1% of uses
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Type “airline (Q46970), railway company (Q249556)”: item must contain property “instance of (P31)” with classes “airline (Q46970), railway company (Q249556)” 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/P229#Type Q46970, Q249556, 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/P229#Single value, SPARQL

Format “[A-Z0-9]{2}”: 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/P229#Format, SPARQL

Qualifiers “start time (P580), end time (P582), reason for deprecated rank (P2241), reason for preferred rank (P7452), latest start date (P8555), earliest date (P1319), earliest end date (P8554), latest date (P1326)”: this property should be used only with the listed qualifiers. (Help)

List of violations of this constraint: Database reports/Constraint violations/P229#allowed qualifiers, hourly updated report, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P229#Scope, hourly updated report, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

List of violations of this constraint: Database reports/Constraint violations/P229#Entity types, hourly updated report

This property is being used by: it:Template:Infobox compagnia aerea, it:Template:Azienda ru:Шаблон:Карточка авиакомпании, ru:Шаблон:Авиакомпания hu:Sablon:Légikód, hu:Sablon:Légitársaság infobox, hu:Sablon:Wikiteszt uk:Шаблон:Авіакомпанія ca:Plantilla:Aerolínia zh-yue:Template:航空公司明細 hy:Կաղապար:Տեղեկաքարտ Ավիաընկերություն be-x-old:Шаблён:Авіякампанія pt:Predefinição:Info/Companhia aérea/Wikidata he:תבנית:חברה מסחרית, he:תבנית:חברה מסחרית/טבלת מזהי תעופה, he:תבנית:חברה מסחרית/קטגוריה az:Şablon:Aviaşirkət eu:Txantiloi:Erakunde infotaula ha:Template:Infobox organization incubator:Template:Wp/shi/Infobox organization kab:Talɣa:Infobox organization shi:Talɣa:Infobox organization commons:Template:Airline/layout roa-tara:Template:Aziende be-tarask:Шаблён:Авіякампанія oc:Modèl:Infobox Organizacion yue:Template:航空公司明細 Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Proposal - Change Data type of IATA airline designator (P229) from String to External identifier

I think String is the wrong type for IATA airline designator (P229). Can we please change it to be External identifier.

As per Help:Data_type#Changing_datatype please indicate support/opposition below. Iwan.Aucamp (talk) 16:52, 15 October 2019 (UTC)

Discussion

•  Oppose The codes are frequently recycled, and some are even reused simultaneously in different regions. "MV" has been used by at least 8 airlines (at least there 8 Wikidata items with that value). ArthurPSmith (talk) 17:16, 15 October 2019 (UTC)