2. 規約と定義

この文書におけるキーワード "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", "OPTIONAL" は, すべて大文字で現れる場合に限り, BCP 14 [RFC2119] [RFC8174] の記述に従って解釈されます.