This is about chemical compounds, molecules. Here it's about atoms, I think. Correct me if I have wrong information, but afaik CheBi has no chemical elements class, so there is no real answer to the original question.

But yes, those classes if they are not already on Wikidata seems OK to have, and subclass of is appropriate as its semantics is the same in Chebi and in Wikidata.


2014-09-25 20:07 GMT+02:00 Benjamin Good <ben.mcgee.good@gmail.com>:
Based on the CHEBI ontology perspective, alcohol is a class with subclasses like 'aromatic alcohol' which has subclasses like 'benzyl alcohols' which has subclasses like 'methylbenzyl alcohol' and so on.

These relationships seem worth capturing and subclass seems like a reasonable way to do it.  If not, would another property be better?

Check out CHEBI here:  http://www.ebi.ac.uk/chebi/advancedSearchFT.do?searchString=alcohol&queryBean.stars=2

-Ben

  

On Thu, Sep 25, 2014 at 10:52 AM, Alain Cuvillier <alain.cuvillier@gmail.com> wrote:
Hi all,

why are both the subclass of and instance of properties set for the ethanol (showcase) item?
For me ethanol is a single concrete alcohol and it is not a class. There is only one ethanol, with a single chemical formula and structure, so only the instance of property is right for this item ?


Thank you
Alain


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