A Comparative Study on the Impact of Part-of-Speech Tagging on Parsing for the Persian Language Processing

In this paper, the role of Part-of-Speech (POS) tagging for parsing in automatic processing of the Persian language will be studied. To this end, the impact of the quality of POS tagging as well as the impact of the quantity of information available in the POS tags on parsing are studied. To reach the goals, three parsing scenarios are proposed and compared. In this study, various evaluation metrics are used to show the impacts from different points of views. The experimental results show that the quality of the POS tagger and the quantity of the information available in the POS tags have a direct effect on parsing performance. The high quality of the POS tags causes error reduction in parsing and also it increases parsing performance. Moreover, lack of morpho-syntactic information in the POS tags has a high negative impact on parsing performance. This impact is more pronounced than the impact of POS tagger performance.