Language is a Process of going from an Unsymbolized Idea (Deep Structure) to a Symbolic Expression (Surface Structure).
This idea, that we hold in consciousness, is an unsymbolized notion which we will call Deep Structure.
How we take that notion and clothe it in symbols for the final expression (which we call Surface Structure) is the essence of the story of language.
Transduction, perception and storage are all necessary for the development and use of language.
But language development itself is the process of learning how to go from deep structure to surface structure, as we will explain later. However, our description will be a little more inclusive than Chomsky's definition).
NOTES: Some intriguing questions on Deep/Surface structure.
NOTES: A little on Deep Structure.