Guido> You've been staring at standards too much, haven't you? The
Guido> difference between MUST and SHOULD isn't as clear-cut as most
Guido> standards people use them.
In the ISO standards world, ``must'' doesn't mean what you
probably think it does:
should: encouraged, but not required
shall: required
must: it is impossible for things to be otherwise
So, for example, one can imagine describing a function with a
Boolean parameter named x by saying something like:
If x is true, the result shall be foo.
Otherwise, x must be false, and the result shall be bar.
--
Andrew Koenig, ark@research.att.com, http://www.research.att.com/info/ark
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