I see your point… but in this proposal we do not add new modes of transport or new scope values, we just want to add a tag for network configuration type so node networks can be handled separate from regular routes. The use of xxn values corresponding to xxn_ref tags in the nodes, I think that is established now for cycling and walking, it’s used widely in NL, BE and DE, so we do not want to touch that now. But on the other hand, this proposal fits another network mode/scope tagging scheme just as much.