They are what every being has. There are five: essence, something, unit, goodness, truth. We can say that an entity or being is that thing, has some essence; that every being or entity is something; that every entity is one, good and true.
a) Essence. Everything that is, has any essence, is that thing. For instance: what I have in my hand is a pen, that is its essence; what there is on the table is a pencil and its essence is to be a pencil.
b) Something. Everything is something, different from another one. For instance: this pen is something different from that pencil. Every being is different from another.
c) Unit. Every being is a unit. This pen is one pen and a pencil is one pencil. Unity can say without division. In the world there are lots of entities and they are distinct.