Abstract Syntax Notation One (ASN.1)是一种独立于机器的描述语言，用于描述在网络上传递的消息 标准包括: ISO 8824-1 | ITU-T X.680: Specification of basic notation, ISO 8824-2 | ITU-T X.681: Information object specification, ISO 8824-3 | ITU-T X.682: Constraint specification,