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How would you express the concept of a given measure to be 3 meters ? Is there an ontology for units ?

flag	asked Dec 1 at 1:26 Stefano Borini 349●7

Jukka Matilainen · Accepted Answer · 2009-12-01 09:42:23Z UTC

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There's also this work-in-progress draft: QUDT - Quantities, Units, Dimensions and Data Types in OWL and XML.

This document is currently "Work in Progress" and will be improved incrementally during the fall of 2009.

answered Dec 1 at 9:42

Jukka Matilainen
230●5

Simon Reinhardt · Answer 2 · 2009-12-02 22:33:41Z UTC

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The Measurement Unit Ontology has extensive discussion of various possible patterns and an ontology.

answered Dec 2 at 22:33

Simon Reinhardt
814●6

Vasiliy Faronov · Answer 3 · 2009-12-01 08:32:29Z UTC

A quick search on SchemaWeb turned up units.owl and unitsInstances.owl, parts of a science ontology.

I can’t readily find a property for connecting a measurement to a unit, but I think it ought to be there as well.

As for the way to express it, here’s an example from the RDF Primer:

exproduct:item10245   exterms:weight   _:weight10245 .
_:weight10245         rdf:value        "2.4"^^xsd:decimal .
_:weight10245         exterms:units    exunits:kilograms .

Michel van Tol · Answer 4 · 2009-12-04 17:21:28Z UTC

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I just found a pretty decent ontology description, and I think it actually does the job quite well...

POSC Units vocabulary

answered Dec 4 at 17:21

Michel van Tol
61●4

Egon Willighagen · Answer 5 · 2009-12-03 08:19:15Z UTC

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The Open Biomedical Ontologies also has an suitable ontology for units:

http://www.obofoundry.org/cgi-bin/detail.cgi?id=unit

The question is, are all mentioned unit ontologies compatible?

answered Dec 3 at 8:19

Egon Willighagen
620●2●10

Ontology for units of measure

5 Answers