[Tagging] tributary role in waterway relations: widespread?

[Mateusz Konieczny]

On Mon, 29 Feb 2016 11:21:44 +0100
David Marchal <penegal at live.fr> wrote:

> Hello, there.
> 
> I wondered: I saw the' tributary' role on some waterway relations;
> while I understand its usage — to represent the fact that a waterway
> flows into another —, I would like to know if it is widespread or
> even widely accepted, if not voted on wiki, as JOSM complains about
> not knowing it every time I use it.
> 
> Awaiting your answers,
> 
> Regards. 	
	 	   		  
For such purposes taginfo is an useful tool - see
http://taginfo.openstreetmap.org//search?q=tributary

It seems to be used extremely rarely. Also, this information is
duplicating geometry of waterways - somebody who needs it may get it by
constructing waterway graph.