|SPRACI uses special keywords or tags to define areas (cities/states/counties/etc) and categories.
Area keywords are usually the name of the area with 'x0', 'x1', x2' or 'x3' in front of it
to prevent ambiguities.
Tags for a country or city name are often mapped onto these for convenience.
Music genres and other categories are usually designated by Tags (or sometimes by a keyword with 'x0' in front of it - in that case there is normally an associated tag)
Most tags used on spraci do not have a hierarchy (you can make up your own tags too in some sections) but some will do have inbuilt associations or a hierarchy that is automatically applied (especially those used for areas)
See the API section of the FAQ for more information about SPRACI Area Keywords.
To see some of the more common tags GO HERE