Systemic functional grammar (SFG), a component of systemic functional linguistics (SFL), is a form of grammatical description originally developed by Michael Halliday

Michael Halliday

Michael Alexander Kirkwood Halliday is a British linguist who developed an internationally influential model of language, the systemic functional linguistic model. His grammatical descriptions go by the name of systemic functional grammar .-Biography:Halliday was born and raised in England...

 in a career spanning more than 50 years. It is part of a social semiotic

Semiotics

Semiotics, also called semiotic studies or semiology, is the study of signs and sign processes , indication, designation, likeness, analogy, metaphor, symbolism, signification, and communication...

 approach to language called systemic-functional linguistics. The term systemic refers to the view of language as "a network of systems, or interrelated sets of options for making meaning".