The exception is the root which is a particular agent often labelled ‘society’ and located on the extreme left of an ontology chart.
If any other particular is present in an ontology chart it is recognised by the ‘#’ sign prefix and upper case letters.
Ontological dependency is a relationship known mathematically as a partial order set relation (poset).
They belong to the class of binary relations but they have three additional properties: reflexivity, anti-symmetry and transitivity.
Because ontology charts have a root that all affordances (realisations/things) are ultimately dependent upon for their existence, they are graphical representation of semi-lattices.