# 1.2 Conventions

_Peios / Advanced Peios / PGSS / Introduction_

> The normative keywords PGSS uses, and the shared conventions it inherits from the PCSA conventions book.

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. PGSS departs from none of it.

Where a chapter needs a convention of its own, that chapter states it.