A generating system… is a kit of parts, with rules about the way these parts may be combined. Almost every ‘system as a whole’ is generated by a ‘generating system’. If we wish to make things which function as ‘wholes’ we shall have to invent generating systems to create them. - Christopher Alexander, 1968, “Systems Generating Systems”
If you want to make a living flower, you don't build it, you grow it from the seed. - Christopher Alexander