This page is work in progress. Starting point was https://josm.openstreetmap.de/ticket/10246#comment:14

Defaultpresets Guidelines

Some rough guidelines for the defaultpresets

New Tags and Values

Basically we have to make sure that the preset menu isn't too cluttered, because it would get hard to find the useful every-day stuff if we had too many exotic entries. New tags and values should have:

• a proper documentation in the ​OSM-wiki
• decent usage numbers (absolute and by number of mappers)
• Controversial cases (like contact:phone=* vs. phone=*) need to be decided case by case
• If a features is only mapped by a handful of specialists, it is better suited for an external preset. Usually this includes tagging schemes restriced to one specific country, hobby, sport or profession.

Note:

• When investigating ​taginfo, also check *where* unusual values are used.
  • You can use overpass API to load these object in JOSM and check in the history who created them.