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Ontology of units of Measure

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Currently, (almost) all subclasses of [unit](http://www.ontology-of-units-of-measure.org/resource/om-2/Unit) are equivalent to a union of some prefixed unit classes and a oneOf class. Example: ```xml area unit ``` I propose to replace these...

This PR solves issue #85 and #13. Changes: * fix domain of [has scale](http://www.ontology-of-units-of-measure.org/resource/om-2/hasScale) * fix restrictions of the [temperature](http://www.ontology-of-units-of-measure.org/resource/om-2/Temperature) and its subclasses regarding the use of [has unit](http://www.ontology-of-units-of-measure.org/resource/om-2/hasUnit) and...

Currently, there exist in OM several subclasses of [scale](http://www.ontology-of-units-of-measure.org/resource/om-2/Scale) that are defined as oneOf a single scale instance (singleton classes). Further, there exists the class [Temperature_scale](http://www.ontology-of-units-of-measure.org/resource/om-2/Temperature_scale), which is defined as...

~~Currently, [commonly has unit](http://www.ontology-of-units-of-measure.org/resource/om-2/commonlyHasUnit) is an object property, that is used for many quantity resources. As quantities are classes, this causes [punning](https://www.w3.org/TR/2012/REC-owl2-primer-20121211/#OWL_2_DL_and_OWL_2_Full). This could easily be solved by making [commonly...

*This issue is a follow up of #33. This issue assumes #78 to get accepted.* To make OM better usable with reasoners, it should comply to OWL 2 EL, OWL...

I'm about to use OM2 ontology for a model that will need to be *inferancable* so I would need the ontology to be OWL DL at most, OWL EL ideally....

It might be worth to do some mapping between OM and QUDT: for example could qudt:QuantityValue be mapped to om:Measure ? There are also other works that I spot at...

Hi, I need to store the error bar values for individual data points. The only thing related to the error I found are the set of 10-percentile through 90-percentile. But...

Hey @HajoRijgersberg @dr-shorthair, while working on https://github.com/kaiiam/UO_revamp/issues/2 I noticed in the https://github.com/HajoRijgersberg/OM/blob/master/om-2-ucum.ttl file the following issue: Note that the second UCUM mapping is wrong: `m` not `m^2` I'll let you...