An introduction to Systemic Functional Linguistics, covering the concept of text, metafunctions, and register variables.

This article talks about the concept of metafunction in SFL.

This article explains the concept of register in SFL, and connects it to the concept of metafunction.

The concept of strata in SFL shows that our linguistic choices are always contextual. We use language not by following "rules," but by considering the context of the situation. Of course, we have meanings to convey, but there are many ways to express one meaning. This concept explains how we choose one pattern over the others.

The SFL rank scale provides us with a hierarchical model of constituency where larger grammatical units are composed of smaller units.