<P> A stakeholder may play both an active and an inactive role: for example, a Consumer is both a "mass - market purchaser" (not interacting with the system) and a User (an actor, actively interacting with the purchased product). In turn, a User is both a "normal operator" (an actor using the system for its intended purpose) and a "functional beneficiary" (a stakeholder who benefits from the use of the system). For example, when user "Joe" withdraws cash from his account, he is operating the Automated Teller Machine and obtaining a result on his own behalf . </P> <P> Cockburn advises to look for actors among the stakeholders of a system, the primary and supporting (secondary) actors of a use case, the system under design (SuD) itself, and finally among the "internal actors", namely the components of the system under design . </P> <Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (July 2015) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (July 2015) </Td> </Tr>

What are the core relationships that are used in use case modelling