OWL / Protege - Defining a concept characteristic involving counts [closed]

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I'm working on an ontology and I'm having an issue regarding the best approach for defining some concepts. To make my question easier to express, I'll take an example.

Let's suppose that I'm interested, while defining the concept of Football, to say that it requires 2 teams. I have 2 approaches:

1. Define a hasTeam object property and a Team class and make Football a subclass of:

   hasTeam exactly 2 Team

2. Define a teamCount data property and make Football a subclass of:

   teamCount value 2

Which are the advantages of each and which might be the better approach when defining an ontology?

Answer 1

The first solution allows you to specify which teams are involved in Football (football match, I assume), while the second does not allow for this - it is just a restriction over the integer datarange saying that the only value admissible for your property is 2.

I would go for the first solution, as the second one basically reduces the data property to a marker - since there is only one possible value, its presence is equivalent to the individual it's applied to belonging to a class, and allows for less information to be modeled. But it really depends on the rest of your requirements.