Existential Analysis in Roman Ingardens Ontology

Ingarden conceives ontology as a philosophia prima, which deals with being as purely possible (it complies with the essentialistic tradition of Duns Scotus and Wolff). It is an intuitive (anschaulich) and a priori analysis of the content of the relevant ideas (rein apriorische Analyse der Ideengehalte). It consists of three parts: existential, formal and material ontology. Existential ontology deals with the possible modes of existence (Seinsweise). Problems of factual existence pertain to metaphysics, which is a separate branch of theoretical philosophy, based on ontology.