Native Support for UML and OCL Primitive Datatypes Enriched with Uncertainty in USE

Measurement uncertainty, an essential property of any physical system, is gaining attention in the modeling community due to the need to specify these kinds of system properties. Some notations already provide support for representing this information, but there is also the need to count on tools with native support for datatypes enriched with measurement uncertainty, able to manage it in a natural and transparent manner. This paper describes the extension that we have developed for the tool UML-based Specification Environment (USE) for supporting the primitive UML/OCL datatypes with uncertainty information.