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Last modified date is: 2010-08-04

Action (owl:Class) The process of doing something. An action is performed by an agent. An action can be proposed (proposed actions make up a plan), implemented or abandoned, and it has a status and possibly one or more suspension periods. Actions can have consequences and can be dependent on other actions, e.g. the action of pouring water from a cup is dependent on the action to first fill the cup with water.

Action_status (owl:Class) The different values the status of an action can take. A possible set of status values could be {proposed, ongoing, completed, abandoned}.

has_status (owl:ObjectProperty) A property that can be used to relate an action instance to its current status. For example, we could represent the fact that "I finished making coffee".

is_consequence_of (owl:TransitiveProperty) A causal relation between actions, i.e. one action is the cause of another action. For example, the action of "swimming" is a consequence of "jumping into deep water".

is_dependent_on (owl:TransitiveProperty) A transitive property for representing other types of dependencies between actions (other than the consequence one). For example, "swimming" is dependent on the action "getting into the water", but it is not necessarily a consequence (we may be able to also walk if the water is shallow).

Plan (owl:Class) A set of proposed actions and the sequence in which to perform them.

Suspension (owl:Class) The time interval within which an action is (temporarily or permanently) suspended.

has_suspension (owl:ObjectProperty) Property that can be used to relate an action instance to periods of suspension of that action. For example, we could represent that I took a lunch break between 1 and 2pm while preparing slides for a particular lecture.

Performance_duration (owl:Class) The time interval within which an action is performed.

is_duration_of (owl:ObjectProperty) Property relating a time interval (a duration) to implemented actions, representing their execution time. For example, the property could be used to represent the fact that I started to make coffee at 9am this morning and finished 5 minutes later.

Implemented_action (owl:Class) An implemented action is an action that has been started.

is_suspension_of (owl:ObjectProperty) Property that can be used to relate a suspension period of suspension to an action. For example, we could represent that I took a lunch break between 1 and 2pm while preparing slides for a particular lecture.

plan_composed_of (owl:ObjectProperty) Property relating a plan to the action(s) (proposed action) that it contains. For example, the plan for making coffee contains the actions "filling up the water container", "adding coffee", and "turning on the coffee machine".

Proposed_action (owl:Class) A proposed action is an action that is in some plan, whether the plan is accepted or shared between agents or not. Proposed actions can be abandoned or implemented.

is_status_of (owl:ObjectProperty) A property that can be used to relate a status to instances of actions. For example, we could represent the fact that "I finished making coffee".

Abandoned_action (owl:Class) An abandoned action is an action which is no longer going to be performed, regardless if it was previously just proposed or actually partly implemented. An abandoned action could be seen as an action that is permanently suspended.

Completed_action (owl:Class) A completed action is an implemented action that has also been finalized.

has_duration (owl:ObjectProperty) Property relating implemented actions (actions that have been started) to their duration, which is a (possibly open-ended) time interval. For example, the property could be used to represent the fact that I started to make coffee at 9am this morning and finished 5 minutes later.

action_proposed_in (owl:ObjectProperty) Property relating an action (proposed action) to the plan(s) in which it is contained. For example, the plan for making coffee contains the actions "filling up the water container", "adding coffee", and "turning on the coffee machine".

has_direct_consequence (owl:ObjectProperty) An intransitive subproperty of the causal consequence property, for representing direct consequences.

has_consequence (owl:TransitiveProperty) A causal relation between actions, i.e. one action is the cause of another action. For example, the action of "swimming" is a consequence of "jumping into deep water". The property is transitive.

is_direct_consequence_of (owl:ObjectProperty) An intransitive subproperty of the causal consequence property, for representing direct consequences.

is_directly_dependent_on (owl:TransitiveProperty) Intransitive version of the dependency property, for representing direct dependency relations.

has_direct_dependent (owl:TransitiveProperty) Intransitive version of the dependency property, for representing direct dependency relations.

has_dependent (owl:TransitiveProperty) A transitive property for representing other types of dependencies between actions (other than the consequence one). For example, "swimming" is dependent on the action "getting into the water", but it is not necessarily a consequence (we may be able to also walk if the water is shallow).