XTRA: a natural-language access system to expert systems

Allgayer, Jürgen; Harbusch, Karin; Kobsa, Alfred; Reddig, Carola; Reithinger, Norbert

doi:10.1016/0020-7373(89)90026-6

Cited by 37 publications

(17 citation statements)

References 3 publications

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“…From the mid-eighties onwards, such a separation was increasingly made (e.g., Kobsa, 1985;Sleeman, 1985;Kass, 1988;Allgayer et al, 1989), but no efforts are reported on rendering the user modeling component reusable for the development of future user-adaptive systems.…”

Section: Early History Of User Modeling Shell Systemsmentioning

confidence: 99%

Generic User Modeling Systems

Kobsa

2007

Lecture Notes in Computer Science

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222

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Abstract. The paper reviews the development of generic user modeling systems over the past twenty years. It describes their purposes, their services within user-adaptive systems, and the different design requirements for research prototypes and commercially deployed servers. It discusses the architectures that have been explored so far, namely shell systems that form part of the application, central server systems that communicate with several applications, and possible future user modeling agents that physically follow the user. Several implemented research prototypes and commercial systems are brie£y described.

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Section: Early History Of User Modeling Shell Systemsmentioning

confidence: 99%

Generic User Modeling Systems

Kobsa

2007

Lecture Notes in Computer Science

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222

213

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“…Figure 5 shows a fragment of the partition hierarchy that has been developed for the application of BGP-MS in XTRA, a natural-language dialog system (Allgayer et al 1989). It is based on the notion of mutual belief.…”

Section: Misconceptions Of the Usermentioning

confidence: 99%

Modeling the user's conceptual knowledge in BGP‐MS, a user modeling shell system1

Kobsa¹

1990

Computational Intelligence

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The paper describes the modeling of a user's conceptual knowledge in the general user modeling shell system BGP-MS. On the one hand, BGP-MS is a workbench for the development of a user model in a particular application domain. It supports the definition of the architecture of the individual user model, and of the architecture and the contents of user stereotypes. A rich representation language for conceptual knowledge, a partition mechanism, and flexible graphics-based interfaces are at the disposal of the user model developer. On the other hand, BGP-MS is a runtime user modeling tool aimed at fulfilling central tasks of a user modeling component in an application system. In this mode, the system offers a functional interface for accessing and updating the model of the current user, as well as basic domainindependent inference mechanisms, support for inferences defined by the developer, and a customizable stereotype management utility. The usefulness of BGP-MS will be demonstrated by illustrating how it can support the user modeling of various recently developed application systems.Key words: user modeling, natural-language dialog systems, knowledge representation. active help systems, personmachine interfaces. Cet article traite de la modelisation des connaissances conceptuelles d'un utilisateur A I'interieur du systeme ginkral de modelisation d'utilisateur BGP-MS. D'une part, le systtme BGP-MS sert de base A I'elaboration d'un modele d'utilisateur A I'interieur d'un domaine d'application particulier. I1 contribue a la dkfinition de I'architecture du modele d'utilisateur individuel. ainsi qu'a la definition de I'architecture et du contenu des stereotypes d'utilisateur. Un langage de representation des connaissances conceptuelles, un mecanisme de partition et des interfaces flexibles A base de graphiques sont au service du concepteur d'un modele d'utilisateur. D'autre part, le systeme BGP-MS est un outil de modelisation d'utilisateur d'execution concu pour remplir les tkhes centrales d'une composante de modilisation d'utilisateur B I'interieur d'un systkme d'application. Dans ce mode, le systtme assure une interface fonctionnelle pour I'acds et la mise A jour du modele d'utilisateur actuel, ainsi que des mecanismes d'inference independante du domaine, un soutien aux inferences difinies par le constructeur et un utilitaire de gestion de stereotypes adaptable. Une illustration du rble du systeme BGP-MS dam la moddisation d'utilisateur de divers systemes d'application recemment mis au point atteste de son utilite.Mots cl6s : modelisation d'utilisateur, systeme de dialogue en langage naturel. representation des connaissances. systeme d'assistance actif, interface personne-machine.

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“…SB-ONE has been developed and used within the XTRA project [Allgayer et al, 1989a;Allgayer et al, 1989b] since 1986. Experiences from this application have influenced the design of the language (particularly as far as the selection of representational elements is concerned) and the design of the other system components.…”

Section: Introductionmentioning

confidence: 99%

“…• The TELL/ASK interface consists of the TELL/ASK language Z:sB_or~z+ and an interpreter which accesses SB-ONE 4 via its functional interface [Allgayer, 1989]. The TELL language often allows knowledge definitions to be made in a more compact form than is possible with the functional interface, particularly as far as concept definitions are concerned, s The retrieval language ASK has a Prolog-like syntax and is combined with a continuation-based solution generator to simulate a Prolog-like query processing.…”

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confidence: 99%

First experiences with the SB-ONE knowledge representation workbench in natural-language applications

Kobsa¹

1991

SIGART Bull.

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SB-ONE is a workbench for the representation of conceptual knowledge, with the emphasis on applications in natural-language systems. Besides the SB-ONE language, the workbench comprises three different interfaces, a partition mechanism, a consistency maintenance system for the syntactic wellformedness of SB-ONE knowledge bases, a classifter, a realizer, a pattern matcher, a spreadingactivation mechanism, an interpreter and classifier for SB-ONE to SB-ONE translation rules, an integration mechanism for an external frame-based representation, and a connection between SB-ONE and an extended Prolog. These components have been employed by a fairly large number of people in various natural-language applications. This paper describes the SB-ONE workbench, illustrates the motivations and philosophies behind its components, and reports some feedback received from users.

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XTRA: a natural-language access system to expert systems

Cited by 37 publications

References 3 publications

Generic User Modeling Systems

Generic User Modeling Systems

Modeling the user's conceptual knowledge in BGP‐MS, a user modeling shell system1

First experiences with the SB-ONE knowledge representation workbench in natural-language applications

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