Are Structural Principles Useful for Automatic Disambiguation?

In this paper we discuss how structural Preferences can be expressed within an LTAG framework on dependancy like structures. We argue that the use of psycholinguistically motivated criteria is useful for building practical parse-ranking applications

Hypertags

Srinivas (97) enriches traditional morpho-syntactic POS tagging with syntactic information by introducing Supertags. Unfortunately, words are assigned on average a much higher number of Supertags than traditional POS. In this paper, we develop the notion of Hypertag, first introduced in Kinyon (00a) and in Kinyon (00b), which allows to factor the information contained in several Supertags into a single structure and to encode functional information in a systematic manner. We show why other possible solutions based on mathematical properties of trees are unsatisfactory and also discuss the practical usefulness of this approach. Introduction As a first step prior to parsing, traditional Part of Speech (POS) tagging assigns limited morpho-syntactic information to lexical items. These labels can be more or less fine-grained depending on the tagset , but syntactic information is often absent or limited. Also, most lexical items are assigned several POS. Although lexical amb..