信息技术 ASN.1 编码规则 第3部分：编码控制表示法（ECN）规范

[中文适用范围]： 本建议书 | 国际标准定义了一种用于指定 ASN.1 类型或部分类型编码的表示法。它提供了多种机制来规范此类规范，包括：– 使用标准化表示法直接指定编码；– 参考标准化编码规则指定编码；– 参考编码结构指定 ASN.1 类型的编码；– 使用非 ECN 表示法指定编码。它还提供了将编码规范与其所适用的类型定义相链接的方法。 [外文原描述]： This document defines a notation for specifying encodings of ASN.1 types or of parts of types. It provides several mechanisms for such specification, including: – direct specification of the encoding using standardized notation; – specification of the encoding by reference to standardized encoding rules; – specification of the encoding of an ASN.1 type by reference to an encoding structure; – specification of the encoding using non-ECN notation. It also provides the means to link the specification of encodings to the type definitions to which they are to be applied. ECN does not currently provide any support for specifications using the OID internationalized resource identifier type or the relative OID internationalized resource identifier type (see Rec. ITU-T X.680 | ISO/IEC 8824-1), and these are not referred to further in this Standard.