Mapping Services Facility › Type Description and Formats › ASN.1 Types

ASN.1 Types

The following simple types are defined by ASN.1, and most are supported by Mapping Services:

• BOOLEAN
• INTEGER
• BIT STRING
• OCTET STRING
• NULL
• OBJECT IDENTIFIER
• ObjectDescriptor
• REAL
• ENUMERATED
• NumericString
• PrintableString
• IA5String
• UTCTime
• GeneralizedTime
• GraphicString
• VisibleString
• GeneralString

One extension supported by Mapping Services is HEX STRING. This is identical to the ASN.1 type OCTET STRING except in the way it is presented to NCL, as described in a later section. In addition, the following types are supported by the compiler, but have no real application to NCL (and are supported as if they are OCTET STRINGS):

• TeletexString
• VideotexString
• ANY and ADB

There are also a number of constructed types defined by ASN.1, and all are supported by Mapping Services:

• SET
• SET OF
• SEQUENCE
• SEQUENCE OF
• CHOICE

How Mapping Services implements each of these types is discussed in the following sections.