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

Previous Topic: HEX STRING Type

Next Topic: OBJECT IDENTIFIER Type

NULL Type

The NULL type is used where data in a component either must be null (that is, empty), or not accessible.

External Form - Input

The only valid input is a null value.

External Form - Output

A null value is always returned.

Local Form and Behavior

The component can be created by an input operation, but no contents are modified. If it already exists no data is modified.