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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 be represented in the form of an ontology using a formal ontology definition language.
The QUDV model has successfully been expressed in OWL2 DL (W3C Web Ontology Language v2) using the open source Protégé v4 tool.
The SysML-QUDV ontology is split into two parts (modules):
The full set of OWL/XML and Manchester OWL Syntax source code files and screenshots is available in this ZIP file sysml-qudv:qudv-owl:2009-10-27-sysml-qudv-in-protege-owl.zip.
The screenshots below from Protege provide an overview.
Asserted Class Hierarchy
Inferred Class Hierarchy
Inferred Class Tree by OWLViz
Object Properties
Data Properties
Selection of Individuals representing ISQ and SI