Title: Dependency resolution and semantic mining using Tree Adjoining Grammars for Tamil Language,
Abstract: Tree adjoining grammars (TAGs) provide an ample tool to capture syntax of
many Indian languages. Tamil represents a special challenge to computational
formalisms as it has extensive agglutinative morphology and a comparatively
difficult argument structure. Modelling Tamil syntax and morphology using TAG
is an interesting problem which has not been in focus even though TAGs are over
4 decades old, since its inception. Our research with Tamil TAGs have shown us
that we can not only represent syntax of the language, but to an extent mine
out semantics through dependency resolution of the sentence. But in order to
demonstrate this phenomenal property, we need to parse Tamil language sentences
using TAGs we have built and through parsing obtain a derivation we could use
to resolve dependencies, thus proving the semantic property. We use an in-house
developed pseudo lexical TAG chart parser; algorithm given by Schabes and Joshi
(1988), for generating derivations of sentences. We do not use any statistics
to rank out ambiguous derivations but rather use all of them to understand the
mentioned semantic relation with in TAGs for Tamil. We shall also present a
brief parser analysis for the completeness of our discussions.