[Talk-is] Road classification and network=*

[riiga]

Hello nordic neighbours from Sweden!

I'd like to improve the use of the "network" key for road routes in 
Iceland.

The background is that I've been contributing to a new map renderer 
(https://github.com/ZeLonewolf/openstreetmap-americana) that uses route 
relations to display route shields on roads, rather than deduce it from 
the keys on each road segment. Iceland seems to already have a 
well-structured system for the classification of roads and use of the 
"network" key, however, there seems to be an inconsistency in how 
multiple classifications of the same route are handled. It would be 
helpful if an order could be decided for the use of multiple values, 
e.g. "S;T;L" instead of having both "S;T;L" on one route and "T;S;L" on 
another, or is there a reason for the specific order?

Another issue, the more important one in fact, is that the values are 
not prefixed with a two-letter country code (see 
https://wiki.openstreetmap.org/wiki/Key:network). I would like to 
introduce this, so that the values in the network key are prefixed with 
"IS:", so e.g. "network=Sx" would become "network=IS:Sx".

Best regards,
riiga