I don't think it's impossible to agree on one schema but it's very expensive to do so and requires tools from the study of philosophy.
While I don't work in the domain, the ontologies in the OBO Foundry and all the ones deriving from Basic Formal Ontology[0] have some level of compatibility that make their integration possible. Still far from "one schema to rule them all" but it shows that agreement can be achieved.
There are other initiatives that I'm aware of that could also qualify as a step in the right direction: "e-Government Core Vocabularies" and the "European Materials Modelling Ontology".
I hope and want to believe that, sooner than later, we will have formalized definitions for most practical aspects of our lives.
While I don't work in the domain, the ontologies in the OBO Foundry and all the ones deriving from Basic Formal Ontology[0] have some level of compatibility that make their integration possible. Still far from "one schema to rule them all" but it shows that agreement can be achieved.
There are other initiatives that I'm aware of that could also qualify as a step in the right direction: "e-Government Core Vocabularies" and the "European Materials Modelling Ontology".
I hope and want to believe that, sooner than later, we will have formalized definitions for most practical aspects of our lives.
[0] https://basic-formal-ontology.org/users.html