Strange things happen on extraction paths
Elisabet Engdahl · Gothenburg University Publications Electronic Archive (Gothenburg University) · 2013
My point of departure is a lecture given in the spring of 1981 at Stanford by Ivan Sag and Gerald Gazdar, using a major technical innovation: They had one overhead projector each, and projected in tandem. The lecture was on GPSG and the major theoretical innovation using SLASH categories. This meant a shift of focus from movement transformations to encoding the information as part of a complex syntactic category. Gazdar’s original notation is shown in (1a). In HPSG, the SLASH feature is included in the feature structure, as outlined in (1b), involving unification between the initial constituent, the filler, and the bottom of the dependency.