ER 2019 - Session #1: Relations in Ontology-Driven Conceptual Modeling - By Claudenir Fonseca, Daniele Porello, Giancarlo Guizzardi, Joao Paulo Almeida and Nicola Guarino

Relations in Ontology-Driven Conceptual Modeling
By Claudenir Fonseca, Daniele Porello, Giancarlo Guizzardi, Joao Paulo Almeida and Nicola Guarino

Motivation:
Intentional misusage of OntoUML contraints due to the non existence of some constructs in OntoUML mapping to UFO. 

He started by the description of the UFO-A taxonomy, defining Endurants, Moments, Substantial, Relators, Instrinsic Moment, Quality, Mode and externally Dependent Mode.

He defined material and formal relations

Then, he moved into the OntoUML stereotypes
Stereotyped classes: Kind, Relator, Role etc.
Stereotyped associations: formal, material etc.

He explained some current limitations of OntoUML
In summary, the material relations are too restrictive while the formal relations are too permissive.

Beyond the limitations: 
It is important to seek for the truthmakers:
- What makes a relation R to hold between x and y?

Solution: 

1) Revised taxonomy:

2) New OntoUML stereotypes

Comparative relations: <<comparative>>

Historical relations: <<historical>>

3) New formalization for these new stereotypes and the old ones (material, formal). These formalizations allow us to check the models and help fix them.