The augmented transition network described in this report was developed in the course of work in semantic interpretation in the context of a computer system which answers English questions. In order to provide mechanical input for the semantic interpreter, a parsing program based on the notion of a "recursive transition network grammar" was…

Some aspects of a theory of grammar are presented which derive from a formal theory of language acquisition. One aspect of the theory is a universal constraint on analyzability known as the Freezing Principle, which supplants a variety of constraints proposed in the literature. A second aspect of the theory is the Invariance Principle, a…

This survey consists of eleven papers covering current topics within the realm of linguistic science. The papers are written by scholars in particular fields, and each one is followed by a list of references and critiques by other linguists. Current theories are discussed and reference is made to recent studies and writings. The areas of…