• reveal and describe relationships among words
    • on various levels:
      • noun, verb prepositional phrases, clauses
      • dependency relation


  • syntactic units are carriers of meaning
    • e.g. "in the city"
      • meaning of "in", "the" is unclear, or very complicated
      • meaning of "in the city" is simply "where"
    • usable for mining information, question answering


  • prerequisites
    • morphological information (e.g. part of speech, number, gender)
    • lexical semantic information (e.g. "pregnant" goes with women only)
  • statistical methods
    • annotated corpus -> inference of rules
    • hard to customize
  • rule-based methods
    • hard to develop and maintain the grammar information
    • easy to customize

... to be continued

Last modified 10 years ago Last modified on May 21, 2013, 5:13:27 PM