Underspeci ed Semantics in HPSG

A General Reasoning Scheme for Underspeci ed Representations

In this paper we present an underspeci ed logic, i.e. a pair consisting of a proper underspeci ed semantic representation formalism and a deductive component that directly operates on these structures. We show how the main features of this formalism can be imported into other existing underspeci ed semantic representation formalisms. We also show that deduction rules may be imported there along...

Dialogue strategies guiding users to their communicative goals

Much work has been done in dialogue modeling for Human Computer Interaction. Problems arise in situations where disambiguation of highly ambiguous data base output is necessary. We propose to model the task rather than the dialogue itself. Furthermore, we propose underspeci ed representations to represent relevant data and to serve as a base for generating clari cation questions that guide the ...

A Computational Theory of Context Dependence

This paper describes a reversible system for the interpretation and generation of sentences containing context dependent constructs like pronouns, focus, and ellipsis. A variant of`quasi-logical form' is used as an underspeci-ed meaning representation, related tòresolved logical forms' viàconditional equivalences'. These equivalences deene the semantics of contextually dependent constructs with...

Relaxing Underspeci ed Semantic Representations for Reinterpretation

Approaches to Surface Realization with HPSG

HPSG is widely used in theoretical and computational linguistics, but rarely in natural language generation. The paper describes some approaches to surface realization in which HPSG can be used. The implementation of all the approaches combines generation algorithms in Prolog and HPSG grammars in ProFIT. It is natural to combine a head-driven HPSG grammar with a head-driven generation algorithm...