NullableArea

Overview

Abstract data type

NullableArea is a simple physical quantity type for the dimension L². NullableArea is abstract and has two concrete subtypes:

• an Area is an actual value for a physical quantity with a numerical value and a unit of measurement;

• a NullArea is a null value that explicitly indicates the absence of an actual physical quantity.

Subtypes

• Area

• NullArea

Implementation in Proteus Schema

All data attributes with type NullableArea are implemented as DEXPI generic attributes for physical quantities.

Example

See the examples for Area and NullArea.