[Tagging] Relations of type=site + tourism=camp_site

[Sven Geggus]

Hello,

about a year ago I implemented support for site relations in OpenCampingMap.

My announcement from back then is at:
https://blog.geggus.net/2021/09/announcing-support-for-site-relations-in-opencampingmap/

Now a recent changeset discussion is questioning my whole approach because it
arguably violates the "One feature, one OSM element principle":

https://www.openstreetmap.org/changeset/126035627

Ignoring the principle (which is not absolute anyway) in this case and
adding a relation of type=site + tourism=camp_site containing the actual
tourism=camp_site object as a member does solve the problem thus I would go
for doing just this as I did a year ago.

Obviously others seem to differ here.

Currently the above changeset breaks my map regarding those campsites where
the tourism=camp_site tag has been removed from the site relation.

External features are no longer shown :(

So how to resolve this problem?

campsites with external features (e.g.  sanitary facilities used by a
campsite and a sport-center) do exist in the wild and they usually do also
have on-the-ground objects (way, node, polygon-relation) where no other tag
than tourism=camp_site does make sense.

What do you think?

Sven