Lexpresso: a Controlled Natural Language
It addresses the problem of human-computer interaction in defense applications by providing a natural language interface, but it appears incremental as it builds on existing Controlled Natural Language concepts.
The paper introduces Lexpresso, a Controlled Natural Language designed as a bidirectional natural language interface for a high-level information fusion system, focusing on its lexical coverage, expressiveness, and integration with formal semantics.
This paper presents an overview of `Lexpresso', a Controlled Natural Language developed at the Defence Science & Technology Organisation as a bidirectional natural language interface to a high-level information fusion system. The paper describes Lexpresso's main features including lexical coverage, expressiveness and range of linguistic syntactic and semantic structures. It also touches on its tight integration with a formal semantic formalism and tentatively classifies it against the PENS system.