A core pattern for events

In our experience, the modeling of events of all sorts is often central in ontology development. Indeed, many proposals for models of events exist, some in the form of lightweight vocabulary, and some in the form elaborately axiomatized ontologies. However, there is as of now no clear, generic, and concisely described pattern for modeling events as part of an ontology. In this brief paper, we describe such a core, minimalistic, generic pattern, and we describe it in the way in which we would have found it useful in our own modeling activities. We do not claim a lot of originality in doing this, we are rather filling an obvious gap in the ontology design patterns landscape.