Halliday & Matthiessen (1999: 151):
Here there is one participant, the Actor, who performs the process in question; and this process may then impact upon another participant, the Goal [dispositive] (or may result in bringing the Goal into (material) existence [creative]). Other participants that may be present are the Beneficiary [Recipient or Client], the one that derives “benefit” from the process; and the Scope, the one that defines the domain over which the process extends.