[Tagging] wetap specific tags

[Martin Koppenhoefer]

I noticed that the wetap app sets tags in a "wetap" name space for
properties for which we already have established tags. Here's an example:
https://www.openstreetmap.org/node/304151931/history

Specifically, it sets the tag
wetap:status=working (IMHO for an amenity this is implied, otherwise it is
disused:amenity if the drinking fountain is not running but still there).
wetap:photo (we use the image tag)

it also sets a "source=wetap" tag on every object that was touched (e.g. if
you confirm an existing object as wetap:status=working, it will put a
source=wetap tag on the object).

The tags are not documented AFAIK.

What is your opinion for this, shall we tolerate alternative tagging to be
introduced systematically by third party apps, when there is already an
established tag with supposedly (undocumented) the same meaning?

Cheers,
Martin
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