http://www.itu.int/ITU-T/asn1/
http://www.itu.int/rec/recommendation.asp?type=products&lang=e&parent=T-REC-X
X.680
Information technology – Abstract Syntax Notation One (ASN.1): Specification of basic notation
X.681
Information technology — Abstract Syntax Notation One (ASN.1): Information object specification
X.682
Information technology — Abstract Syntax Notation One (ASN.1): Constraint specification
X.683
Information technology — Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications
X.690
Information technology — ASN.1 encoding rules: Specification of
Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
X.691
Information technology — ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)
X.692
Information technology — ASN.1 encoding rules: Specification of Encoding Control Notation (ECN)
X.693
Information technology — ASN.1 encoding rules: XML encoding rules
ASN.1 Editor