[Tagging] network tag on route relations

[Mike Thompson]

Hello,

According to the wiki[0], it seems that the network tag has different
meanings and possible values based upon if it is applied to a route
relation where route=road vs. route=bicycle/mtb/foot/etc.

If I am understanding this correctly, when route=road, network= the
specific network that the road is part of, for example, a US Interstate
would be US:I[2]

For bicycle/mtb/foot etc. it seems that the network tag indicates the scope
of the network, for example a nationwide network cycling network would
network=ncn[1]

1) Why can't the network tag have consistent meaning across all route
types? For a mapper, as well as a data user, this is confusing.
2) The scope of a cycling/walking/etc. network should be evident from the
geographic extent of its members, so isn't network=icn/ncn/etc. redundant?
In any event, if the specific network is specified, it will, in most cases,
also indicate the general scope.

Mike

[0] https://wiki.openstreetmap.org/wiki/Key:network
[1]
https://wiki.openstreetmap.org/wiki/Key:network#Bicycle.2C_hiking_and_other_recreational_routes
[2]https://wiki.openstreetmap.org/wiki/Key:network#Hierarchical_format
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