[CF-metadata] bounds

[Bob Drach]

Jonathan,

> We don't have to introduce the "Z"-ordering i.e. (x,y,2,2), about which you
> had reservations. Brian suggested that its advantage over (x,y,4) ordered
> anticlockwise is that it specifies which is the starting vertex as well as the
> ordering. We could have that advantage and still keep (x,y,4). That seems
> preferable to me as it is less complicated for the standard than any other
> choice.

I don't have any objection to the (x,y,2,2) representation. I could be wrong, but
there also seems to be a reasonable consensus that (x,y,2,2) is acceptable. Anyway
I think the main goal is to wrap up these final issues before summer arrives.

--Bob