The SysML QUDV (Quantities, Units, Dimensions and Values) modelLibrary is specified in a UML/SysML class/block diagram. In order to generalize its potential usage and alignment with other standardization efforts concerning quantities and units, it is of interest to verify that the QUDV model can also represented in the form of an ontology using a formal ontology definition language.

The QUDV model has successfully been expressed in OWL 2 (W3C Web Ontology Language v2) using the open source Protégé v4 tool, as can be seen in the following screenshots.