rfc2119.tex (287B)
1 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", 2 "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this 3 document are to be interpreted as described in \codeword{RFC2119} when, and 4 only when, they appear in all capitals, as shown here.