Swedish Institute of Computer Science

D. Sahlin

M. Carlsson

This paper is a revised version of [Sahlin89] and is meant to be read in conjunction with [ACHS88] as the notation used is presented there and only briefly summarized here. The full source code for the shunting algorithm is given in this paper."

Variable Shunting for the WAM.

Mats Carlsson

There exist several proposals for the treatment of clause indexing in a compiler for the WAM. These are discussed, and a particular proposal is advocated, which postpones as long as possible the creation of choicepoints. We then address some problems with implementing the cut operator. Finally, it is shown how indexing instructions can subsume certain body goals.

On Compiling Indexing and Cut for the WAM.

Annika Waern

Abstract: "The paper describes a model for the presentation of route guidance information, that is able to incorporate both static and dynamic route guidance within the same general interface structure. The model distinguishes between two modes that are dependent on the driver's knowledge: Expert Mode: The driver has enough local knowledge to understand which route the system wants him to take. Novice Mode: The driver has no knowledge about the advised route. During a route guidance session, the driver might change between the modes several times. Based upon this distinction, a conceptual model for interface design is presented and motivated. The paper discusses to what extent a presentation system must check for, and correct, driver misconceptions. Such checking requires the development of a formal model of the driver's knowledge about alternative routes."

Some Thoughts about Interface Design

Presenting Route Guidance Information

Björn Gambäck

Abstract: "The paper describes S-VEX, the lexical acquisition component of the Swedish Core Language Engine (S-CLE). The S-CLE is a general purpose natural language processing system for Swedish developed from its English counter-part, the SRI Core Language Engine. In parallel with the development of the S-CLE, a Swedish version of the English VEX (Vocabulary EXpander) system was designed. S-VEX allows for the creation of lexicon entries by users with knowledge of an application domain but not of linguistics or of the detailed workings of the system. The approach taken is based on eliciting grammaticality judgments and information of inflected forms interactively from the user. The S-VEX system and the lexicon of the S-CLE is described, as well as the problems of the specific lexical acquisition task and their solutions. The only 'real' linguistic information the user needs to provide is the general category (noun, verb, or adjective) of the new lexical entry. All other information needed to create lexicon entries is obtained from the user's answers to questions/examples presented to her by the system. For determining the morphological inflections, the system is equipped with knowledge of 41 different inflectional classes. When constructing the syntatic usage part of the lexical entries, S-VEX is provided with pointers to entries in a 'paradigm' lexicon for a number of representative word usages and declarative knowledge of the range of sentential contexts in which these usages can occur. This knowledge is encoded in 58 sentence patterns. The paradigm lexicon of the present system contains 62 different paradigms: 5 for nouns, 10 for adjectives, and all the others for verbs."

Swedish Institute of Computer Science

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