What are Shape Grammars?
“A shape grammar is a set of rules that apply in a step-by-step way to generate a set, or language, of designs. Shape grammars are both descriptive and generative. The rules of a shape grammar generate or compute designs, and the rules themselves are descriptions of the forms of the generated designs.”
Shape Grammars in Education and Practice: History and Prospects (Terry Knight, 1999)