Algorithms for Analysing the Temporal Structure
نویسندگان
چکیده
We describe a method for analysing the temporal structure of a discourse which takes into account the eeects of tense, aspect, temporal adverbials and rhetorical structure and which minimises unnecessary ambiguity in the temporal structure. It is part of a discourse grammar implemented in Carpenter's ale formalism. The method for building up the temporal structure of the discourse combines constraints and preferences: we use constraints to reduce the number of possible structures, exploiting the hpsg type hierarchy and uniication for this purpose; and we apply preferences to choose between the remaining options using a temporal centering mechanism. We end by recommending that an underspeciied representation of the structure using these techniques be used to avoid generating the temporal/rhetorical structure until higher-level information can be used to disambiguate.
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