Property talk:P2258

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mobile country code
identifier for countries in ITU-T Recommendation E.212 for use in describing mobile networks

Represents	mobile country code (Q978801)
Has quality	numeric identifier (Q93868746)
Data type	String
Domain	mainly countries (note: this should be moved to the property statements)
Allowed values	[02-79]\d\d
Example	Afghanistan (Q889) → 412 Singapore (Q334) → 525 Armenia (Q399) → 283
Source	Wikipedia article (note: this information should be moved to a property statement; use property source website for the property (P1896))
See also	mobile network code (P2259)
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 Database reports/Constraint violations/P2258 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 709 Main statement 196 27.6% of uses Qualifier 511 72.1% of uses Reference 2 0.3% of uses
Search for values

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

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/P2258#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/P2258#Unique value, SPARQL (every item), SPARQL (by value)

Format “[02-79]\d{2}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2258#Format, hourly updated report, SPARQL

Item “instance of (P31): country (Q6256)”: Items with this property should also have “instance of (P31): country (Q6256)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: Test Network (Q21273023), no label (Q60324609)
List of violations of this constraint: Database reports/Constraint violations/P2258#Item P31, search, 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/P2258#Unique value, SPARQL (every item), SPARQL (by value)

Datatype change

There was some discussion to change it here. I don't see any reason not to change this to external id.
--- Jura 08:14, 16 May 2018 (UTC)

Since the discussions are quite old, I'm pinging people who were involved in the project, just to be sure that there's a consensus. @ArthurPSmith, Multichill, Pigsonthewing, Nikki: Are you fine with converting P2258 into an external ID? Lea Lacroix (WMDE) (talk) 12:33, 30 May 2018 (UTC)

Fine by me. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 12:58, 30 May 2018 (UTC)

@Pigsonthewing, Multichill, Nikki, Lea Lacroix (WMDE), Jura1: More than half the uses of this property are as a qualifier, for example for BASE (Q809824) - "mobile country code" is used as a qualifier for "mobile network code". I'm not sure what impact this would have on our conception of it as an identifier - if it's intended as an identifier for countries (which it does mostly work at) then why wouldn't the qualifier here be the country rather than the code? It seems it's really more than just an identifier? Plus there's no formatter URL so there's no particular advantage to having it listed as an external id... ArthurPSmith (talk) 13:26, 30 May 2018 (UTC)

• @Lea Lacroix (WMDE): do you want to add something to sum this up from a dev perspective?
  --- Jura 09:50, 1 June 2018 (UTC)

We don't have any particular technical opinion to add. Just a question: why do you want to change it to an external id? What would be the advantage in your workflow? Lea Lacroix (WMDE) (talk) 11:23, 1 June 2018 (UTC)

Good to hear that there are no technical obstacles. From a Wikidata contributor perspective, it would be consistent with the other country codes.
--- Jura 11:32, 1 June 2018 (UTC)