On Wednesday 10 January 2018, Mateusz Konieczny wrote:
>
> I think that seasonal for values other than no should be accompanied
> by intermittent=yes (for the same reasons as parking=surface tag
> alone is not sufficient, one should also add amenity=parking).
>
> But some think that this is adding superfluous detail (like adding
> motor_vehicle=yes to motorways).

That is not the same situation - intermittent=* and seasonal=* are both 
supplemental (secondary) tags that do not make any sense alone while 
highway=motorway and amenity=parking are primary tags.  

There are tons of secondary tags that partly imply each other.  Most 
prominent example is probably access restrictions where you can be more 
or less specific (vehicle=no implying motor_vehicle=no implying 
snowmobile=no).

Trying to force mappers either not to have partly redundant tags or to 
have them added in all cases is not an approach that is likely to be 
successful.  Data users just have to deal with that.

As a data user you should in particular be aware of course that 
intermittent=yes + seasonal=no is a meaningful combination (with 68k 
uses).

-- 
Christoph Hormann
http://www.imagico.de/

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