A general survey of dependency theory from the viewpoint of the professional linguist, examining in detail the motivation as well as the structure of the theory. Dependency grammars characterize the class of context-free languages, assigning to each sentence of a characterized language a tree structure with minimal syntactic units at the nodes. Transformational or stratified linguistic systems can be constructed on dependency theory. Semantic and psychological considerations motivate specific features of the theory, but are unnecessary as justifications.
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