Units of Measurement Systems
The project contains the following modules:
Unit systems are defined in a modular nature. On top of API and implementations (e.g. RI) each application may use one or more unit systems.
Also see The history of unit systems
Depending on the environment (Embedded, Desktop/Server or a particular Java version) implementations use a different Maven artifactId. Unless explicitly highlighted, all other systems run on every supported environment using the Reference Implementation.