[Tagging] default value for "oneway"

[ael]

To suggest that we now have to include every possible tag with an
explicit value on every element is just ridiculous: the logical
consequence of an explicit oneway on all ways.

Where there really is a need to remove ambiguity, surely something like
an area or perhaps relation (less obvious to the casual mapper) is
needed within which the default value(s) for a tag(s) is defined.
Now I start worrying about new ways crossing the area, so maybe a
relation is better after all.

Just a suggestion which needs refinement if anyone here thinks this is
sensible.

But the current argument: "shall we or not?" isn't going anywhere and 
normal mappers just won't add explicit tags in normal circumstances.
You need a different approach and maybe what I say above can start the
ball rolling.

ael