ISO/TS 10303-1780:2008 specifies the application module for External unit.
The following are within the scope of ISO/TS 10303-1780:2008:
- definition of a unit that is not included in the data exchange file and is defined in an external dictionary;
- items within the scope of application module External library, ISO/TS 10303-1778;
- items within the scope of application module Value with unit, ISO/TS 10303-1054.