A PROLOG Implementation of Government-Binding Theory
A PROLOG Implementation of Government-Binding Theory Robert J. Kuhns Artificial Intelligence Center Arthur D. Little, Inc. Cambridge, MA 02140 USA Abstrae_~t For the purposes (and space limitations) of A parser which is founded on Chomskyts this paper we only briefly describe the theories Government-Binding Theory and implemented in of X-bar, Theta, Control, and Binding. We also PROLOG is described. By focussing on systems of will present three principles, viz., Theta- constraints as proposed by this theory, the Criterion, Projection Principle, and Binding system is capable of parsing without an Conditions. elaborate rule set and subcategorization features on lexical items. In addition to the 2.1 X-Bar Theory parse, theta, binding, and control relations are determined simultaneously. X-bar theory is one part of GB-theory which captures eross-categorial relations and 1. Introduction specifies the constraints on underlying structures. The two general schemata of X-bar A number of recent research efforts have theory are: explicitly grounded parser design on linguistic theory (e.g., Bayer et al. (1985), Berwick and Weinberg (1984), Marcus (1980), Reyle and Frey (1)a. X~Specifier (1983), and Wehrli (1983)). Although many of these parsers are based on generative grammar, b. X-------~X Complement and transformational grammar in particular, with few exceptions (Wehrli (1983)) the modular The types of categories that may precede or approach as suggested by this theory has been follow a head are similar and Specifier and lagging (Barton (1984)). Moreover, Chomsky Complement represent this commonality of the (1986) has recently suggested that rule-based pre-head and post-head categories, respectively.
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