You may have noticed that I sometimes writes some words in UPPERCASE, not because I’m angry, but because there is a RFC about that subject.
I SHOULD have included this notice from RFC 1129:
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.
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