Agent: Actor in an event who initiates and carries out the event intentionally or consciously, and who exists independently of the event.
Attribue: Undergoer that is a property of an entity or entities, as opposed to the entity itself.
Beneficiary: Undergoer in a state or an event that is (potentially) advantaged or disadvantaged by the event or state.
Cause: Actor in an event (that may be animate or inanimate) that initiates the event, but that does not act with any intentionality or consciousness; it exists independently of the event.
Agent: Agent who is acting in coordination or reciprocally with another agent while participating in the same event (specific to events with symmetrical participants).
Patient: Patient that participates in an event with another patient, both participate equally in the event (specific to events with symmetrical participants).
Theme: Theme that participates in an event or state with another Theme; both participate equally (thereby distinguishing this role from Pivot; specific to events with symmetrical participants).
Destination: Goal that is a concrete, physical location.
Experiencer: Patient that is aware of the event undergone (specific to events of perception).
Extent: Value indicating the amount of measurable change to a participant over the course of the event.
Goal: Place that is the end point of an action and exists independently of the event.
Initial_Location: Source that indicates the concrete, physical location where an event begins or a state becomes true.
Instrument Undergoer in an event that is manipulated by an agent, and with which an intentional act is performed; it exists independently of the event.
Material: Patient that exists at the starting point of action (inheritance from Source), which is transformed through the event into a new entity; concrete or abstract.
Patient: Undergoer in an event that experiences a change of state, location or condition, that is causally involved or directly affected by other participants, and exists independently of the event.
Pivot: Theme that participates in an event with another theme unequally. Pivot is much more central to the event (thereby distinguishing it from Co-Theme).
Participant: Entity involved in a state or event.
Product: Result that is a concrete object.
Result: Goal that comes into existence through the event.
Source: Place that is the starting point of action; exists independently of the event.
Stimulus: Cause in an event that elicits an emotional or psychological response (specific to events of perception)
Theme: Undergoer that is central to an event or state that does not have control over the way the event occurs, is not structurally changed by the event, and/or is characterized as being in a certain position or condition throughout the state.
Time: Participant that indicates an instant or an interval of time during which a state exists or an event took place.
Topic: Theme characterized by information content transferred to another participant (specific to events of communication).