A Robust Transformation-Based Learning Approach Using Ripple Down Rules   for Part-of-Speech Tagging
  In this paper, we propose a new approach to construct a system of transformation rules for the Part-of-Speech (POS) tagging task. Our approach is based on an incremental knowledge acquisition method where rules are stored in an exception structure and new rules are only added to correct the errors of existing rules; thus allowing systematic control of the interaction between the rules. Experimental results on 13 languages show that our approach is fast in terms of training time and tagging speed. Furthermore, our approach obtains very competitive accuracy in comparison to state-of-the-art POS and morphological taggers. 
Dat Quoc Nguyen, Dai Quoc Nguyen, Dang Duc Pham, Son Bao Pham
cs.CL