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ASN.1 Standards

The following standards can be downloaded from the ITU site. This link to the ASN.1 information site gives more information for downloading :

Specifications of the notation :

  • Specification of Basic Notation (ITU-T Rec. X.680 / ISO/IEC 8824-1) 
  • Information Object Specification (ITU-T Rec. X.681 /ISO/IEC 8824-2) 
  • Constraint Specification (ITU-T Rec. X.682 / ISO/IEC 8824-3) 
  • Parameterization of ASN.1 Specifications (ITU-T Rec. X.683 / ISO/IEC 8824-4) 

Specifications of Encoding Rules :

  • Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) (ITU-T Rec. X.690 / ISO/IEC 8825-1) 
  • Specification of Packed Encoding Rules (PER) (ITU-T Rec. X.691 / ISO/IEC 8825-2) 
  • Specification of Encoding Control Notation (ECN) (ITU-T Rec. X.692 / ISO/IEC 8825-3)
  • Specification of XML Encoding rules (XER) (ITU-T Rec X693 / ISO/IEC 8825-4)