ASN.1/C# Standards Conformance

The OSS ASN.1 Tools for C# implements the ASN.1 language as described by the following standards:

• ITU-T Recommendation X.697 (ISO/IEC 8825-8:2021)
  Information technology - ASN.1 Encoding Rules: Specification of Javascript Object Notation (JSON) Encoding Rules (JSON/ER)
• ITU-T Recommendation X.696 (ISO/IEC 8825-7:2021)
  Information technology - ASN.1 encoding rules: Specification of Octet Encoding Rules (OER)
• ITU-T Recommendation X.693 (ISO/IEC 8825-4:2021)
  Information technology - ASN.1 encoding rules: XML Encoding Rules (XER)
• ITU-T Recommendation X.691 (ISO/IEC 8825-2:2021)
  Information technology - ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)
• ITU-T Recommendation X.690 (ISO/IEC 8825-1:2021)
  Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
• ITU-T Recommendation X.683 (ISO/IEC 8824-4:2021)
  Information technology - Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications
• ITU-T Recommendation X.682 (ISO/IEC 8824-3:2021)
  Information technology - Abstract Syntax Notation One (ASN.1): Constraint specification
• ITU-T Recommendation X.681 (ISO/IEC 8824-2:2021)
  Information technology - Abstract Syntax Notation One (ASN.1): Information object specification
• ITU-T Recommendation X.680 (ISO/IEC 8824-1:2021)
  Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation
• ITU-T Recommendation X.208 (1988)1
  Specification of Abstract Syntax Notation One (ASN.1)
• ISO/IEC 8824:1990
  Information technology - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1)
• ITU-T Recommendation X.209 (1988)
  Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1)
• ISO/IEC 8825:1990
  Information technology - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1)

1In the few places where X.208 (1988) and ISO/IEC 8824:1990 are contradictory, the OSS® ASN.1 Tools implements ISO/IEC 8824:1990.