http://www.estrellaproject.org/lkif-core/expression.owl#Speech_Act
Class expression:Speech_Act
Annotations
rdfs:comment
A speech act (or illocutionary act) creates some propositional attitude which qualifies an expression (which by default is mediated through some medium). The actor of the speech act is the utterer of the atitude (NB cannot be expressed in OWL DL).