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Table of Contents
Quantities, Units, Dimensions, Values (QUDV)
A working group of the SysML 1.2 Revision Task Force (RTF) has completed a proposed conceptual model for Quantities, Units, Dimensions, Values (QUDV) to define systems of units and quantities for use in system models. This page is being maintained to coordinate with other groups and projects looking at similar topics.
QUDV Resources
If accepted by the SysML 1.2 RTF, a new non-normative Annex C.5, specifying the QUDV Conceptual Model, will be added to the Version 1.2 update of the SysML specification.
The draft Annex is being made available here for any anyone who may find it useful or who can provide feedback:
| Model Library for Quantities, Units, Dimensions and Values (QUDV) | Draft Proposed Annex C.5 for SysML Version 1.2 | annex_c.5_2009-07-27.pdf |
Additional material, including UML serializations of the QUDV model and further examples, is expected to be added in this section.
Links
* This work is based on concepts of the International Vocabulary of Metrology (VIM), which may be obtained at the following link:
| International Vocabulary of Metrology (VIM) 3rd edition 2008 | http://www.bipm.org/en/publications/guides/vim.html |
* The current version of the SysML specification is 1.1, which is available at the following link:
| OMG Systems Modeling Language (OMG SysML) Version 1.1 | http://www.omg.org/spec/SysML/1.1/ |
* Ontolog Community initiated activities:
| During the OntologySummit2009_Symposium, the “Quantities and Units of Measure” was identified as a candidate ontology-based standard that folks from the standards community and the ontology community can (and should) work together on. Further momentum has been developing through the active discussion among the community members on this matter in the [ontology-summit] mailing list, prompting us to put this session together. |
* Communiqué: Toward Ontology-based Standards
| The joint communities of ontologists and standards developers represented at this year's summit hereby endorse the application of ontology science and engineering to standards. Some good examples of this kind of approach are illustrated by the following list of concrete, near-term projects. |
| A harmonized ontology of units and dimensions |
