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I'm working on a test ontology on flight reservation. I have a problem defining an axiom on a part of my ontology.

I have three classes, called Person, VIPPerson and NormalPerson and a property is_after to indicate that a person has to go after an other one.

What I want to say is that each instance of NormalPerson has to be related to each instance of VIPPerson by the relation is_after. Is it possible to express this axiom in a class definition?

Feel free to format or retitle my message if you want to.

Lepticed
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    I found another answer [here](https://stackoverflow.com/questions/21512765/how-to-relate-each-instance-of-class-with-each-instance-of-another-class?rq=1). I used rolification and it worked. – Lepticed Sep 13 '19 at 16:45

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