original_query: What is systemic functional grammar (SFG) and who originated it?
query: What is systemic functional grammar (SFG) and who originated it?
answer: Systemic functional grammar (SFG) is a form of grammatical description originated by Michael Halliday. It's part of a social semiotic approach to language called systemic functional linguistics.  It views language as a network of systems with choices for making meaning, and focuses on language's function in social life.