On Wed, Aug 21, 2019 at 8:44 PM Houcemeddine A. Turki
<[email protected]> wrote:
>
> I thank you for your efforts. It was an honour for me to meet you in 
> Stockholm. Concerning the points you raised, I
> 1. Concerning the problematic use of Instance of and SubClass of, I invite 
> you to see https://tinyurl.com/y29lx9o4. This seems to be not accurate as 
> drugs differ from drug classes from a pharmacological view. For example, 
> Artemisinin, Ibuprofen and Sobosbuvir are drugs. However, drug classes should 
> include antibiotics and antivirals. Concerning WikiProject Ontology, I know 
> it. The project succeeded to solve many matters related to the structure of 
> Wikidata. However, the project is slow.

To me this is actually a nice example of *why* we need to distinction.

Sobosbuvir as in instance is often the active ingredient.
Sobosbuvir as a class is often the formulation, which is not a single
entity, but a class of formulations with different amounts (and
concentrations) of active ingredient

It's just that in street/common language (not wrong, just different!)
we don't use different words for it. Instance-vs-subclass are tools
that help us make this distinction.

Now, related to this, plz have a look at
https://www.wikidata.org/wiki/Wikidata:WikiProject_Chemistry where
class and instance are both used, for good reasons.

Egon

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-----
E.L. Willighagen
Department of Bioinformatics - BiGCaT
Maastricht University (http://www.bigcat.unimaas.nl/)
Homepage: http://egonw.github.com/
Blog: http://chem-bla-ics.blogspot.com/
PubList: https://www.zotero.org/egonw
ORCID: 0000-0001-7542-0286
ImpactStory: https://impactstory.org/u/egonwillighagen

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