The Usage view displays axioms that reference (or mention) the current selected entity. More specifically, it displays axioms that contain the current selected entity in their signature.

Usage is sorted by the subject entity (where possible) and all expressions are hyperlinked for easy navigation.

The Usage view can be useful for finding out how much a particular entity is used in an ontology, or when you want to know where a class has been used as the filler of a restriction for example.

There are additional filters that are available as a series of checkboxes at the top of the view, which reduce the number of usages shown:

See also

Common View Look and Feel