Halliday & Matthiessen (1999: 168-9, 169n):
The Range is not some entity that is impacted by the Process; it either(i) expands the Process, or(ii) is projected by it.
Where the relationship is one of expansion, this take one of two forms: the Range either
(a) elaborates the Process in an objectified form, or(b) enhances it by delimiting its scope.¹⁴
¹⁴ The Range elaborates the Process, whereas the circumstantial element Rôle elaborates a participant in its particular participation in the process.