scope:

This Recommendation | International Standard 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.