Basic Principles for Segmenting Thai EDUs

This paper proposes a guideline to determine Thai elementary discourse units (EDUs) based on rhetorical structure theory. Carson and Marcu’s (2001) guideline for segment-ing English EDUs is modified to propose a suitable guideline for segmenting EDUs in Thai. The proposed principles are used in tagging EDUs for constructing a corpus of discourse tree structures. It can also be used as the basis for implementing automatic Thai EDU segmentation. The problems of deter-mining Thai EDUs both manually and auto-matically are also explored and discussed in this paper.