Taginfo/Sources
Contents
OSM Database
The main source is, of course, the OSM database itself. From the planet.osm dump many different statistics are calculated and entered into taginfo.
Wiki
The wiki contains description of keys and tags and much more. Currently taginfo will collect all the Key:xxx, Tag:xxx, and Relation:xxx pages (and their different language variants) and extract the information from them (not just those tags listed on Map Features).
JOSM
Taginfo gets some information from style rules in JOSM. THIS WILL BE REMOVED SOON. JOSM support has been rolled into the 'Projects' source, see below.
Languages
Taginfo gets information about the different languages of the world, their codes, names, etc. from several IANA and Unicode registries.
Projects
Other sources such as the editors (for instance iD), routers (Open Source Routing Machine), and renderer configurations can be added using external project files. Help is always appreciated.