Re: Established vocabularies for units in RDF?

One quick comment, QUDT seems to assume that all measure scales can be expressed as multiples of a unit, but this is not the case for some measure scales, eg Mohr hardness or the Beaufort wind scale, which are purely ordinal. No doubt this is of little importance to anyone not wishing to use an ordinal scale, however. 

Pat Hayes

On Aug 19, 2016, at 8:45 AM, Norman Gray <norman@astro.gla.ac.uk> wrote:

> 
> Greetings.
> 
> Paul Houle asked:
> 
>>>> I am wondering today what is the state of the art in terms of representing
>>>> measurement units in RDF.
> 
> As Simon Cox mentioned, QUDT <http://qudt.org> is very mature.  It's comprehensive and thoughtful, and the authors are fully aware of the various subtleties which can crop up with units.  That it's associated with both TopQuadrant and NASA is a recommendation.
> 
> The current version is 1.1, the site says 'Release 2 of QUDT is being published incrementally.', and the last update to that page was in August 2016.
> 
> There already seems to be worryingly many units ontologies (ie, more than one).  QUDT has worked for me (I've used it for a project <https://bitbucket.org/nxg/unity> concerned with parsing unit strings).
> 
> All the best,
> 
> Norman
> 
> 
> -- 
> Norman Gray  :  https://nxg.me.uk
> SUPA School of Physics and Astronomy, University of Glasgow, UK
> 
> 

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Received on Friday, 19 August 2016 21:56:32 UTC