[Tagging] How to tag named group of named water areas?

[Richard]

On Tue, Nov 06, 2018 at 11:26:49PM -0600, Gerd Petermann wrote:
> Hi all,
> 
> after reading the last comments in this thread I tried again to convince
> Dave that the rather special rules for multipolygon relations cannot be used
> for all types of relations, esp. not those with route=pipeline and that he
> should not remove tags like man_made=pipeline from ways of such a relation,
> see this long discussion:
> https://www.openstreetmap.org/changeset/64027881
> 
> I give up now because for me a type=multipolygon relation is something
> completely different and Dave insists that it is are not. Seems we are both
> frustated now :-(

my experience with waterways tells me that "essential tags" (like natural=water)
allways belong to the members and not any encompassing relation such as 
relation:waterway.
man_made=pipeline looks like on of those tags I would always put on the members,
not the relation.

Richard