This Technical Corrigendum 3 to ITU-T Rec. X.680 | ISO/IEC 8824-1:

a) introduces new easier value notation for REAL;

b) allows ASN.1 to express what the type within a BIT STRING or OCTET STRING type is;

c) allows ASN.1 to express what the encoding of the value within an OCTET STRING or BIT STRING type is;

d) allows ASN.1 to specify a pattern for the characters that can appear in a restricted character string type;

e) introduces the Encoding Control Notation;

f) corrects an example so that it uses valid object identifier values;

g) modifies F.3.2.2 (Semantic Model) for new value notation for REAL.