GOBO::ClassExpression::RelationalExpression

An GOBO::ClassExpression in which the members are constructed by applying a relation. For example, "the set of all things that are part_of an oocyte". In this expression, the relation is part_of and the target is oocyte.

 REL(TARGET)

For example:

  part_of(CL:0001234)

Same as a Class Restriction in OWL