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Abstract : |
formalisms that are used in theoretical analyses of language. They are att~=,~ctive because they may provide just the aspects of context sensitive expressive power that actually appear in human languages while otherwise remaining context free. This paper describes how we have applied the thmry of Tree Adjoinln ~ Grammars to natural language generation. We have been attracted to TAG's because their central operation-the extension of an "initial " phrase ~hucture tree through the inclusion, at very specifically constrained locations, of one or more "auxiliary" trees--corresponds directly to certain central operations of our own, performance-oriented theory. We begin by briefly describing TAG's as a formalism for phrase structure in a competence theory, and summarize the points in the theory of TAG's that are germaine to our own theory. We then consider generally the position of a grammar within the generation process, introducing our use of TAG'S through a contrast with how others have used systemic grammars. This takes us to the core results of our paper: using examples from our research with weft-written texts from newspapers, we, |
