It is equivalent to stating

shop=bakery
bread=wholemeal:x;y;wholemeal:z

Or the more conventional:
bread=wholemeal_x;y;wholemeal_z

On Thu, May 2, 2024 at 10:19 AM iriman--- via Tagging
<tagging@openstreetmap.org> wrote:
>
> Hi
> I've tagged a few bakeries for the bread they sell.
> At first I used semicolon to separate values:
>
> shop=bakery
> bread=x;y;z
>
> Since I'm focused on adding/updating bakeries that are using wholemeal flour 
> in their products, I added a general tag bread:wholemeal=yes.
>
> But this tag was too general because some bakeries sell more than one type of 
> bread and not all of them are made of wholemeal flour. So I decided to 
> separate values with a namespace scheme:
>
> shop=bakery
> bread:x=yes
> bread:y=yes
> bread:z=yes
>
> and expanded this tagging by another tag per bread to know if it's made of 
> wholmeal flour:
>
> bread:x:wholemeal=yes
> bread:z:wholemeal=yes
>
> By this method it's possible to face a long list of tags of bread types for a 
> single bakery and also a lot of namespaced keys in general, as pointed by 
> mueschel:
>
> <https://www.openstreetmap.org/changeset/150528116>
>
> So is it better to retag like first tagging and also add the bread:wholemeal 
> with semicolon-separeted values?
>
> shop=bakery
> bread=x;y;z
> bread:wholemeal=x;z
>
> or any other suggestion?
>
> Thanks
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> Tagging@openstreetmap.org
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