ASN.1 tutorial

      Introduction to ASN.1

      Defining types and identifiers

      Data types

            BOOLEAN type: Represent TRUE/FALSE states

            INTEGER : Represent integer values

            BIT STRING

            OCTET STRING

            DATE: Working with dates

            TIME-OF-DAY: Represent time of the day

            DATE-TIME: Represent date and time together

            REAL: Working with decimal numbers

            ENUMERATED: Model list of items

            OBJECT IDENTIFIER

            SEQUENCE: Define collection of items

            SEQUENCE OF : Define collection of items of same type

            CHOICE: Choose an item among multiple items

            IA5String: Represent International Alphabet 5

            VisibleString: Create a string variable

            NumericString: string with numbers

            UTF8String: Create a string of Unicode characters

            SET: Define composite type

            SET OF: Collection of items of same type

            ANY: Refer any valid ASN type

      Applying constraints on types

      Comments

      Specifying OPTIONAL fields

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