Region is the class representing a Unicode Region Code, also known as a Unicode Region Subtag, which is defined based upon the BCP 47 standard. More...
Region is the class representing a Unicode Region Code, also known as a Unicode Region Subtag, which is defined based upon the BCP 47 standard.
We often think of "regions" as "countries" when defining the characteristics of a locale. Region codes There are different types of region codes that are important to distinguish.
Macroregion - A code for a "macro geographical (continental) region, geographical sub-region, or selected economic and other grouping" as defined in UN M.49 (http://unstats.un.org/unsd/methods/m49/m49regin.htm). These are typically 3-digit codes, but contain some 2-letter codes, such as the LDML code QO added for Outlying Oceania. Not all UNM.49 codes are defined in LDML, but most of them are. Macroregions are represented in ICU by one of three region types: WORLD ( region code 001 ), CONTINENTS ( regions contained directly by WORLD ), and SUBCONTINENTS ( things contained directly by a continent ).
TERRITORY - A Region that is not a Macroregion. These are typically codes for countries, but also include areas that are not separate countries, such as the code "AQ" for Antarctica or the code "HK" for Hong Kong (SAR China). Overseas dependencies of countries may or may not have separate codes. The codes are typically 2-letter codes aligned with the ISO 3166 standard, but BCP47 allows for the use of 3-digit codes in the future.
UNKNOWN - The code ZZ is defined by Unicode LDML for use to indicate that the Region is unknown, or that the value supplied as a region was invalid.
DEPRECATED - Region codes that have been defined in the past but are no longer in modern usage, usually due to a country splitting into multiple territories or changing its name.
GROUPING - A widely understood grouping of territories that has a well defined membership such that a region code has been assigned for it. Some of these are UNM.49 codes that do't fall into the world/continent/sub-continent hierarchy, while others are just well known groupings that have their own region code. Region "EU" (European Union) is one such region code that is a grouping. Groupings will never be returned by the getContainingRegion() API, since a different type of region ( WORLD, CONTINENT, or SUBCONTINENT ) will always be the containing region instead.
The Region class is not intended for public subclassing.
Definition at line 72 of file region.h.
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