“The science or study of being, that department of metaphysics which relates to the being or essence of things” (OED). In IRL, the ontological level of the foundations of all knowledge makes two statements about the underlying structure of all beings, as data patterns prior to interpretation as information and knowledge. The first is the Principle of Unity, which states that Wholeness is the union of all opposites. Secondly, the underlying structure of the Universe is an infinitely dimensional network of hierarchical relationships. Actually, the Principle of Unity lies at the mezzanine level between the gnostic and ontological levels for this fundamental design principle of the Universe unifies the ineffable, formless Absolute and the relativistic world of form.
Greek on, genitive ontos, from ont-, stem of present participle einai ‘to be’, and -logia, from -logos, ‘one who deals or treats of a certain subject’.