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Computer Science @ Rochester
Monday, October 06, 2008
11:00 AM
CSB 703
Aravind Joshi
University of Pennsylvania
Flexible Composition, Multiple Adjoning and Word Order Variation
Tree-Local Multi-Component TAGs (called hereafter just MC-TAG for short) are known to be weakly equivalent to standard TAGs, however, they can describe structures not derivable in the standard TAG. There are other variants of MC-TAG, such as MC-TAG with (a) flexible composition and (b) multiple adjoining of modifier (non-predicative) auxiliary trees that are also weakly equivalent to TAGs, but can describe structures not derivable with MC-TAG. Our main goal in this paper is to determine the word order patterns that can be generated in these MC-TAG variants while respecting semantic dependencies in the grammar and derivation. We use some word order phenomena such as scrambling and clitic climbing to illustrate our approach. This is not a study of scrambling or clitic climbing per se. We do not claim that the patterns of dependencies that are derivable are all equally acceptable. Other considerations such as processing will also come into play. However, patterns that are not derivable are predicted to be clearly unacceptable.