for category queries like "restaurants", etc.
any human settlement including cities, towns, villages, hamlets, localities, etc.
these are usually boroughs or districts within a city that serve some official purpose e.g. "Brooklyn" or "Hackney" or "Bratislava IV"
sovereign nations and their dependent territories, anything with an ISO-3166 code.
informal subdivision of a country without any political status
numbered/lettered entrance
venue name e.g. "Brooklyn Academy of Music", and building names e.g. "Empire State Building"
usually refers to the external (street-facing) building number. In some countries this may be a compount, hyphenated number which also includes an apartment number, or a block number (a la Japan), but libpostal will just call it the house_number for simplicity.
named islands e.g. "Maui"
expressions indicating a floor number e.g. "3rd Floor", "Ground Floor", etc.
phrases like "in", "near", etc. used after a category phrase to help with parsing queries like "restaurants in Brooklyn"
post office box: typically found in non-physical (mail-only) addresses
postal codes used for mail sorting
street name(s)
numbered/lettered staircase
a first-level administrative division. Scotland, Northern Ireland, Wales, and England in the UK are mapped to "state" as well (convention used in OSM, GeoPlanet, etc.)
usually a second-level administrative division or county.
usually an unofficial neighborhood name like "Harlem", "South Bronx", or "Crown Heights"
an apartment, unit, office, lot, or other secondary unit designator
currently only used for appending “West Indies” after the country name, a pattern frequently used in the English-speaking Caribbean e.g. “Jamaica, West Indies”