this paper was supported in part by S-DIME (Swedish dialogue move engine), NUTEK/HSFR Language Technology project F305/97, SDS (Swedish dialogue systems), NUTEK/HSFR Language Technology project F1472/1997, TRINDI (Task Oriented Instructional Dialogue), EC Project LE4-8314, INDI (Information exchange in dialogue) , Riksbankens Jubileumsfond project 1997-0134 and Maisie (Multimodal access to public
... [Show full abstract] information services) (KFB project 1997-0856-059). An earlier version of this paper was presented at ITALLC98 (Information theoretic approaches to Logic, Language and Computation), HsiTou, Taiwan, 17--19th June, 1998. This current draft is submitted to the proceedings. simple structure and a basic operation (extension) that can be reused again and again in the creation of different kinds of semantic objects. In this regard records potentially play a similar role for semantics that feature structures (with the associated operation of unification) have played elsewhere in linguistic theory.