Re: Definition of "can" in XBD

[Eric Vought <yyyy@xxxxxxxxxxxxxxxxxxxxxx>]

As you say, once the distinction between functionality available to the
application and functionality provided by the implementation is made, the
meanings become obvious. It would be great if a trimmed version of Don's
explanation and his example could find their way into the document. These
are terms that are absolutely critical to understanding how to use or
implement this spec.

> No disagreement with Don, but a thought: *if* you already know
> the distinction between shall/must and may/can, the definitions
> are obvious.  If you don't, they aren't particularly obvious.
> A few words of coaching in the definitions, or even just italicizing
> (for emphasis) the words "implementation" and "application" would
> probably help other new readers.
> 
> Eric: as a recent victim of that subtlety, what would have helped
> you?