Nominalizations in PUNDIT

نویسندگان

  • Deborah A. Dahl
  • Martha Palmer
  • Rebecca J. Passonneau
چکیده

This paper describes the t rea tment of nominalizations in the PUNDIT text processing system. A single semantic definition is used for both nominalizations and the verbs to which they are related, with the same semantic roles, decompositions, and selectional restrictions on the semantic roles. However, because syntact ical ly nominalizations are noun phrases, the processing which produces the semantic representat ion is different in several respects from tha t used for clauses. (1) The rules relating the syntact ic positions of the consti tuents to the roles tha t they can fill are different. (2) The fact tha t nominailzations are untensed while clauses normally are tensed means tha t an al ternat ive t rea tment of time is required for nomlnalizations. (3) Because none of the arguments of a nominallzation is syntactically obllgatory, some differences in the control of the filling of roles are required, in part icular , roles can be filled as par t of reference resolution for the nominalization. The differences in processing are captured by allowing the semantic interpreter to operate in two different modes, one for clauses, and one for nominalizations. Because many nomlnalizations are noun-noun compounds, this approach also addresses this problem, by suggesting a way of dealing with one relatively tractable subset of noun-noun compounds. 1Formerly SDC-A Burroughs Company.

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تاریخ انتشار 1987