]> Agreement defines the terms of cooperation between the business parties. It doesn't necessarily imply economic commitments. Association between the Agents collaborating in the same Event, often representing two different business parties. Interface activity involves an explicit communication with other Agents. Resource-Event-Agent Enterprise Ontology, invented originally by William E. McCarthy. This version takes into account the extensions related to the REA Enterprise Script models. Recipe is a collaboration protocol for fullfilling the economic exchange events through a series of ordered tasks (activities). Agents can be associated with each other, e.g. by responsibility, or by collaboration. Agents keep resources in custody, i.e. they exercise a control over them. Economic Events are dual, i.e. events with resource inflow are paired with events with resource outflow. Commitments execute Events, i.e. they cause the Events to happen at a specified time. Execution of a Transition is conditionally dependent on the evaluation of the condition expression. Resources are linked together (e.g. forming a whole-part relationship). A series of tasks specify how the collaboration is preformed between Agents (the collaboration protocol). Recipe for the collaboration between Agents. The collaboration looks differently for each Agent involved, hence the multiple cardinality. Commitments are reciprocal, i.e. they define mutually equivalent obligations to be fulfilled by the parties in servies of Events. Stock-flow type describes what kind of resource transfer or transformation occurs. Processes are linked with stock-flows. Dual Events are coupled by incoming and outgoing stock-flows. From a given Task there can be many possible options to execute other linked Tasks.