Hi Minko,
With the Overpass turbo tool you can find some examples in a certain area for instance all nodes with name & ref:
Thanks, good to know. I have used Osmosis on downloaded map extracts until now.
This Post office gets a name tag "PostNL 9320156662: Mado" I dont think the ref tag is very useful ;-)
I would also say that it should be brand=PostNL, name=Mado instead of name=Mado, operator=PostNL. I am not sure if we should try to filter out garbage that has been put to the map data. I would rather fix the map data than to work around errors in it.
Also brand or operator names that are the same as the name tag, for instance brand=Esso name=Esso can be ignored. There is a style rule that can compare if the brand name is the same as the name tag: ${brand|not-equal:name} or ${operator|not-equal:name}.
OK, this makes sense. Marko