The Condition model extends the Event model by defining the ConditionType. The ConditionType introduces the concept of states differentiating it from the base Event model. Unlike the BaseEventType, Conditions are not transient. The ConditionType is further extended into Dialog and AcknowledgeableConditionType, each of which has their own sub-types.
The Condition model is illustrated in Figure 9 and formally defined in the subsequent tables. It is worth noting that this figure, like all figures in this document, is not intended to be complete. Rather, the figures only illustrate information provided by the formal definitions.