The ASN.1 CHARACTER STRING type allows the definition of character sets to be deferred until runtime. This set of characters can be negotiated, and carries characters defined in any abstract syntax. The set of abstract characters is not statically defined. The abstract syntax may belong to the presentation context set allocated in an instance of communication or can be directly referenced when using the CHARACTER STRING type. The CHARACTER STRING type is represented by a predefined SEQUENCE.
MyString ::= CHARACTER STRING
The CHARACTER STRING type can be constrained by a single value and by constraints on its components (inner subtyping). Permitted alphabet constraints are not allowed.