Noun-case and verbal agreement in grammar modeling for Urdu-Hindi languages

摘要

There are many natural language processing applications of a computational grammar. In this paper, modeling of Urdu/Hindi noun-case and verbal system based on head driven phrase structure grammar (HPSG) is presented. Urdu/Hindi have a strong noun case marking system, which results in free phrase order. Subject case depends on tense aspect and as well as on verb transitivity. Moreover, verbal morpheme and auxiliary in Urdu/Hindi tense system sometimes agrees with subject of the sentence, sometimes with object and sometimes takes default agreement. This results in a more involved model based on HPSG as compared with English, where dependency is always on subject. This paper proposes the modifications in HPSG based model of English that deals with more involved agreement requirements of Urdu/Hindi sentences.