Taxonomic Tree of GFO
GFO (General Formal ontology) draws a fundamental distinction between concrete entities, categories and sets. Sets are described by an axiomatic fragment of set theory of Zermelo-Fraenkel, although fragments of anti-foundation axiom set theories such as ZF-AFA are considered.
Concrete entities are entities which are in time and space, while categories have universal character.
Read more about this topic: General Formal Ontology
Famous quotes containing the word tree:
“Go to the adolescent who are smothered in family—
Oh how hideous it is
To see three generations of one house gathered together!
It is like an old tree with shoots,
And with some branches rotted and falling.”
—Ezra Pound (1885–1972)