Re: Established vocabularies for units in RDF?

Hi all,
[ my 2 cents ] 

> Le 19 août 2016 à 17:45, Norman Gray <norman@astro.gla.ac.uk> a écrit :
> 
> As Simon Cox mentioned, QUDT <http://qudt.org <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.  

+1. 
> 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.

We use it to publish geodata at data.ign.fr. Here are some relevant namespaces we use:

qudt-dimensionalunit: <http://qudt.org/1.1/vocab/dimensionalunit#>
qudt-dimension: <http://qudt.org/1.1/vocab/dimension#>
qudt-quantity: <http://qudt.org/1.1/vocab/quantity#>

Yes, they are at /1.1/vocab of the namespace qudt.org. 
> 
> There already seems to be worryingly many units ontologies (ie, more than one).  

In our use- case, we used this namespace for unit: <http://qudt.org/1.1/vocab/unit#>  


HTH
Ghislain

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