JOSM provides the capability to include presets from external sources. It is the perfect mechanism for a group of mappers to maintain a specialized set of presets. This way, »Special Interest« mappers like skiers, mountain bikers or seamen can feed menu entries they need directly into JOSM without polluting the default menu space of JOSM.
Some examples are available via JOSM’s wiki pages. There’s also a page how to create and use such presets.

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