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" 应按照 BCP 14, RFC 2119 [RFC2119] 中的描述进行解释。