1.1. Conventions Used in This Document (本文档中使用的约定)
1.1. Conventions Used in This Document (本文档中使用的约定)
本文档中的关键词 "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", 和 "OPTIONAL" 应按 RFC 2119 [KEYWORDS] 中描述的方式解释。