Persistence is about how things behave across time. It is generally discussed in terms of endurantism (three-dimensionalism) and perdurantism (four-dimensionalism). Despite the relevance of persistence to ontological modeling, however, there is no clear consensus over how to characterize precisely those two theories of persistence. This paper takes the initial steps towards a foundation for ontology of persistence. In particular, I examine by employing recent findings from philosophy of persistence how some major upper ontologies conceptualize endurantism and perdurantism. My resulting modest suggestion is that formal-ontological discussion on persistence should be updated by expanding its perspective beyond the topic of whether objects have proper temporal parts or not.
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