ISO-proposed ASN. 1 (Abstract Syntax Notation One) and ASN-BER (Basic Encoding Rules forASN.1) proved to be highly powerful and flexible, but with low efficiency and large overheads in normalimplementations.

• 国际标准化组织提出的抽象语法ASN-1和传送语法ASN-BER功能强,通用灵活,但在一般实现中存在编码效率低和开销大的缺点。