Using Mapping Services › NCL Reference, Type Checking, and Data Behavior › ENUMERATED Type

ENUMERATED Type

The ENUMERATED type is used to constrain a component to a defined set of values. Each defined value is named using a name identifier similar to a component name. Associated with each name is a unique integer value (which can be signed), for example:

Color ::=ENUMERATED { red(0),blue(1),yellow(2),
                      green(3),black(7) }

External Form—Input

The external form must be one of the names listed in the ENUMERATED type. The enumerated values are not allowed (that is, red is valid, 0 is not).

External Form—Output

Same as input.

Local Form and Behavior

Internally, the ENUMERATED value is kept in the same manner, and is subject to the same local form constraints, as an INTEGER of the binary local form.