"A UnitOfAnnotation or a Relation can carry Features that express annotations attached to them. By convention, (tags that represent) Features can be linked with Feature individuals, as well. Because of this reflexivity, a predicate like hasDegree(positive) allows to retrieve the individual positive as well. (This is necessary if positive represents a tag on its own, rather than being a property of a complex tag.)"^^ . . . "has feature"@en . .