Annotation Axioms

Annotations can be used to associate information to ontologies, this infomation could be the version of the ontology or the creator. The annotation itself consists of an annotation property and an annotation value.

Annotation assertion axiom

These axioms are used to add additional information to a class, it can be used to describe the class using the natural language desciption.

For Example:
AnnotationAssertion( rdfs:comment :car "Represents the set of all cars." ) 

Annotation property domain axiom

The annotation property domain axiom states that the domain of the annotation property is a specific IRI.

Annotation property range axiom

The annotation property range axiom states that the range of the annotation property is a specific IRI.

Sources

1. https://www.w3.org/TR/owl2-syntax/#Annotations
2. https://www.w3.org/TR/owl2-primer/#Annotating_Axioms_and_Entities