is a subclass of - states that all instances of the class to the left are also instances of the class to the right
the Space or Maintained Resource this is a use case for
Declare a use case for a given Space or Maintained Resource, as a category (class) to which concrete examples can be attached later on. The use case gets a name, an optional description, and an optional link to a matching Wikidata concept. Concrete examples can afterwards be attached to the use case with the 'Providing an example for a use case' template.
matching topic/concept on Wikidata (optional)
short name for the use case, used as URI suffix