Numerous toolkits are available for developing speech-based
dialogue systems. We survey a range of currently available toolkits, highlighting
the different facilities provided by each. Most of these toolkits
include not only a method for representing states and actions, but also a
mechanism for reasoning and selecting the actions, often combined with a
technical framework designed to simplify the task of creating end-to-end
systems. This near-universal tight coupling of representation, reasoning,
and implementation in a single toolkit makes it difficult both to compare
different approaches to dialogue system design, as well as to analyse the
properties of individual techniques. We contrast this situation with the
state of the art in a related research area|automated planning|where
a set of common representations have been defined and are widely used
to enable direct comparison of different reasoning approaches. We argue
that adopting a similar separation would greatly benefit the dialogue
research community
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