On Wed, Aug 21, 2019 at 8:44 PM Houcemeddine A. Turki turkiabdelwaheb@hotmail.fr wrote:
I thank you for your efforts. It was an honour for me to meet you in Stockholm. Concerning the points you raised, I
- 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