Jul 14, 2020, 17:48 by dieterdre...@gmail.com:

>
> sent from a phone
>
>> On 14. Jul 2020, at 16:55, Lionel Giard <lionel.gi...@gmail.com> wrote:
>>
>> That's a bit of a stretch of the multipolygon definition as there is no 
>> inner ring.
>>
>
> sorry? The minimum requisite for a multipolygon is one outer ring.
>
Exactly, valid multipolygon (though usually not useful) may have a single outer 
way.

Multipolygons can be used to represent disjointed areas or without holes in 
them.

Inner ring(s) are completely optional.

>> I never used multipolygon for anything else than complex geometry (with 
>> inner ring(s)) and that seems to be what the feature is for.
>>
>
>
> If you can use areas to represent something, you should prefer them over the 
> site relation, it is stated in bold on the site page.
>
Exactly, multipolygons are also for things such as disjointed parks:

https://www.openstreetmap.org/relation/61707#map=16/50.0705/19.9930&layers=N
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