sent from a phone

> On 29. Jul 2018, at 09:57, Javier Sánchez Portero <javiers...@gmail.com> 
> wrote:
> 
> To avoid problems when querying, in case of explicitly add units, I would 
> prefer to use a separate tag like maxspeed:units=mph, for example.


spreading the information over 2 tags creates another point of possible 
failure: units and tag value getting out of sync.

Moving the unit into the key would work better in some way: height_m=3
maxspeed_mph=25
It would enable differing values in different units, but at least these would 
be evidently wrong (e.g maxspeed_kph=30 and ...mph=25 on the same object), and 
of course you shouldn’t add both anyway (unless they would both be legally 
correct)

cheers,
Martin 


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