Peter Ludlow, "Referential Semantics for I-Languages?"

Ludlow presents three different conceptions of referential semantics and argues that two of them (one according to which reference is a relation that holds between expressions and mental representations, and the other according to which reference is a complex relation holding between expressions, speakers, context, and the world) are compatible with Chomsky's conception of I-language. He also suggests that, on the assumption that we think of the structure of language and the structure of the world as isomorphic (LWI, or Language-World Isomorphism), doing semantics and doing metaphysics might illuminate one another.

(In Chomsky and His Critics, Blackwell, 2003)