Insert comment here Insert version here Insert label here The Protege metadata ontology (in the version that is used inside Protege. Note that this is an OWL Full ontology, with annotation properties that have range and domain restrictions. However, the "official" online release of this file is OWL DL, so that ontologies that use Protege metadata annotations can still be shared as OWL DL. Modality is the theory of possibility and necessity. As a grammatical feature, it represents those dimensions in the domains of knowledge (epistemic modality), social relations (deontic modality) and ability (abilitive modality), and possibly others. DeonticModality indicates that an agent has permission or is under an obligation to perform some action. MentalAbilitiveModality indicates that an agent has the capacity to perform some mental action (Bybee, Perkins, and Pagliuca 1994: 192; Palmer 2001: 77). MentalAbilitive AbilitiveModality indicates the capacity of an agent to perform some action, regardless of type or condition. PossibilityModality indicates that the designated state of affairs is possible, either directly, or because an agent has the ability or permission to carry it out. EpistemicPossibilityModality indicates that the designated state of affairs is not known not to be true. EpistemicModality indicates that a state of affairs is known to be possible or certain (necessary). EpistemicNecessityModality indicates that the expressed proposition is known to be true. Also known as CategoricalModality (Palmer 2001: 37, 68-69). Categorical NecessityModality indicates that the described state of affairs is necessary, either directly, or because of a requirement on the part of an agent. WeakObligativeModality indicates that an agent is under a moral obligation to perform the action expressed by the predicate (Bybee, Perkins, and Pagliuca 1994: 186-187). WeakObligative Any modality feature value not defined here. The top of the modality value hierarchy. Permissive PermissiveModality indicates that an agent has permission to perform the action expressed by the predicate (Palmer 2001: 10, 71). ObligativeModality indicates that an agent is required to perform the action expressed by the predicate (Bybee, Perkins, and Pagliuca 1994: 177; Palmer 2001: 71). Obligative ConditionalPhysicalAbilitiveModality indicates ability of an agent to perform some action, requiring the presence of conditions external to the agent (Bybee, Perkins, and Pagliuca 1994: 177; Palmer 2001: 76) PhysicalAbilitive PhysicalAbilitiveModality indicates that an agent has the physical capacity to perform some action (Bybee, Perkins, and Pagliuca 1994: 192; Palmer 2001: 77). GeneralAbilitive