Format
A data frame with 5 columns: "a2", "a3", "name", "mapname", "sovereignty". These contain the 2- and 3-letter ISO code, the official name, the (possibly shorter) name used in the map data base, and the sovereign country.NOTE
Some countries have different ISO codes for some regions. To deal with such particular cases, the "mapname" column may sometimes contain (perl-style) regular expressions rather than simply a country name. For instance, "FI" has mapname "Finland(?!:Aland)", because the Aland islands have a different ISO code. Other codes may appear in two rows if certain parts of countries are not written with the main country as base name. Usually, that is for compatibility with the legacy world data base.