Consistent grammar development using partial-tree descriptions for Lexicalized Tree-Adjoining Grammars
Fei Xia, Martha Stone Palmer, K. Vijay‐Shanker, Joseph Rosenzweig · 1998
Introduction An important characteristic of an FB-LTAG is that it is lexicalized, i.e., each lexical item is anchored to a tree structure that encodes subcategorization information. Trees with the same canonical subcategorizations are grouped into tree families. The reuse of tree substructures, such as wh-movement, in many different trees creates redundancy, which poses a problem for grammar development and maintenance (VijayShanker and Schabes, 1992). To consistently implement a change in some general aspect of the design of the grammar, all the relevant trees currently must be inspected and edited. Vijay Shanker and Schabes suggested the use of hierarchical organization and of tree descriptions to specify substructures that would be present in several elementary trees of a grammar. Since then, in addition to ourselves, Becker, (Becker, 1994), Evans et al. (Evans et al., 1995), and Candito(Candito, 1996) have developed systems for organizing trees of a TAG which could be used