[Tagging] "Relations are not categories" excepted for "type=network" ?

[Michael Kugelmann]

Am 15.07.2014 17:58, schrieb Pieren:
> I discover that OSM contains 1575 relations of "type=network"
> (taginfo). I guess its definition is coming from this wiki proposal:
> http://wiki.openstreetmap.org/wiki/Relations/Proposed/Network
As a hint for further inverstigations: I guess this might be public 
transportation related


Cheers,
Michael.