Ontology of spatial concepts in a natural language interface for a mobile robot

In this paper we present problems connected with the construction of a natural language (NL) interface for a mobile robot. We determine the spatial information that should be analysed in this kind of interface, as well as indicate which information can be omitted. This study is a contribution to our long-term research program on man-machine communication. Implementation of a virtual agent (ACALA) equipped with a natural language interface is important from a methodological point of view because it permits us to observe natural language interaction between the human user and the computer-controlled system.