[Tagging] New proposal: Obligatory tagging of oneway on motorway_link

[Joachim]

I drafted up a proposal about oneway=* for highway=motorway_link.
Please comment.
http://wiki.openstreetmap.org/wiki/Proposed_features/Motorway_link_obligatory_oneway

Proposal:
Define on the wiki page of highway=motorway_link that oneway=* must
also be tagged for every motorway_link. If not tagged, the oneway=*
status of this way is undefined.

- For rendering purposes ways with undefined oneway should be
displayed like the default, i.e. without oneway arrows.
- For routing purposes it is recommended to not route over ways with
undefined oneway since any assumption may be wrong and it would be
best to correct the data.
- In map editors undefined oneway should be displayed as tagging error.

Cheers, Joachim (Jojo4u)