[Tagging] Superroutes - good, bad or ugly?

[Peter Elderson]

The just-a-chain-of-ways relation doesn't have to be shared. It's
shareable, but the sharing really is of no consequence.

I think software needs a tag to control the selection for the purpose it
serves, OR allow any route relation without a type within all route types
it supports.

I would indeed go for an explicit label, just not "shared". Maybe "general"
or "chain" or "basic" or "segment", "fragment", "elementary", just not
something that says how it's going to be used.

Editors can keep their check that there MUST be a supported type tag, and
add that type=basic (or whatever word is chosen) can only have a single
consecutive ordered collection of ways. Other routes of any type should be
allowed to contain ways AND basic routes, apart from more complex checking
for particular cases such as PT variants.
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