11.2.9 Accessibility and Discourse Structure: Summary

Accessibility and discourse structure.

The examples showed us how noun phrases introduce discourse referents and how pronouns co-refer to some of these noun phrases by referring to their discourse referents. Not all discourse referents are available for pronouns: the internal structure of discourse representations constrains the accessibility of discourse referents. The position of a discourse referent in the DRS determines whether it can be referred to by a pronoun, or put differently, whether it is accessible or not.

Accessibility itself is formally defined using the notion of subordination between DRSs. Informally, a DRS subordinates another DRS if the first encapsulates the second. A special case of subordination are implicational DRS-condition, where the antecedent DRS subordinates the consequent DRS. For a precise formalisation of subordination please see the definition.

Aljoscha Burchardt, Stephan Walter, Alexander Koller, Michael Kohlhase, Patrick Blackburn and Johan Bos
Version 1.2.5 (20030212)