"must" has multiple meanings - it can indicate a requirement but it also can be used to state the inevitable: e.g., "What goes up must come down."
Though in general, I'm not a fan of writing in all caps, "MUST" removes the ambiguity indicating that it is to be understood as defined, rather than having its regular English meaning.
All caps for the words also helps the requirement statements stand out when scanning through a document.
On Wed, Mar 30, 2016 at 9:52 AM, Adam Roach <adam@xxxxxxxxxxx> wrote:
On 3/30/16 11:32, Dave Cridland wrote:
Finally, I'd note in passing that "bill" and "Bill", "will" and "Will", "heather" and "Heather", all have different semantics based on case - not that this is particular relevant.
It's actually quite relevant, since it shows that we already have significant cases in which merely changing letter case can alter meaning nontrivially. There's a somewhat bawdy example of this that you can find by typing "capitalization matters" into Google Image Search. (Probably not safe to do in many workplaces).
It kind of takes the wind out of arguments that people will miss the difference between letter cases.
/a