1.2 Conventions
The key words MUST, MUST NOT, SHOULD, SHOULD NOT, and MAY in this document are to be interpreted as described in RFC 2119. Text set off as a note is informative, not normative.
Everything else — roles, byte order, sizes, layout tables, notation, strings, timestamps, citation, and the external standards this anthology depends on — is defined in the Conventions book and is not restated here. PSPU departs from none of it.
Where a chapter needs a convention of its own, that chapter states it.