Check out the new USENIX Web site. next up previous
Next: Nested frames Up: The EP4IR grammar Previous: The EP4IR grammar

Head/Modifier frames

The frames generated when parsing some text represent only the major relations expressed in the text:

relation example
subject [N:script,V:calls]
relation [P:it,V:reduced]
object [V:performed,N:research]
relation [V:interrupted,P:it]
attr/pred [N:divergent,N:function]
relation [N:analysis,A:syntactic]
preposition [V:interacts,with N:user]
relation [N:interaction,with N:user]
  [A:relative,to N:counter]


Notice the fact that each word is typed as Noun, Pronoun, Adjective or Verbform and that, except for the prepositions, all other words are eliminated: adverbs, determiners, quantifiers. What is left is really the bare bone structure of the text. The goal is to get rid of embellishments and variations which add no value for retrieval purposes.

The types may be used in further processing of the frames, or they may be removed by some postprocessing.

A demo version of the parser/transducer is available at the website of the [AGFL project]; trying it out may help in understanding the HM frame representation.


next up previous
Next: Nested frames Up: The EP4IR grammar Previous: The EP4IR grammar
Kees Koster
2002-05-01