id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
18341	Copy Memberships?	maxerickson@…	team	"I wonder if a tool to ""copy"" relation memberships would be worth having.

Recent inspiration is from working with administrative boundaries for islands in Lake Huron. I, without realizing the consequences, used ""Update Multipolygon"", to add an island to several relations at once. JOSM proceeded to download all members of Lake Huron, at which time things got a little slow.

Thinking about other situations, when a highway is a member of multiple relations, it can get tedious to do something like add a short segment of dual carriageway (the easy way is to split a segment of the existing road for each side).

A tool that worked at the logical level and just added a way to the relations that the example way is part of would be helpful in both situations, as it is simple to reason about and so on. "	enhancement	closed	minor		Core		wontfix	relation, multipolygon