Logico-Semantic Relations Between Process+Medium And Other Participants

Agent — Initiator, Actor (effective), Phenomenon (effective), Sayer (effective), Token (effective), Attributor, Assigner — and Beneficiary — Client, Recipient, Receiver — are related by enhancement.

Range varies between elaboration — Scope, Behaviour, intensive Attribute, intensive Value (middle) — and projection — Phenomenon (middle), Verbiage.  See Halliday & Matthiessen (1999: 172-6).