The encoding rules specified in this Recommendation | International Standard:
? are used at the time of communication;
? are intended for use in circumstances where interoperability with applications using JSON is the major concern in the choice of encoding rules;
? allow the extension of an abstract syntax by addition of extra values for all forms of extensibility described in Rec. ITU-T X.680 | ISO/IEC 8824-1.
This Recommendation | International Standard also specifies the syntax and semantics of JER encoding instructions, and the rules for their assignment and combination. JER encoding instructions can be used to control the JER encoding for specific ASN.1 types.