tailieunhanh - Báo cáo khoa học: "AN APPLICATION OF AUTOfIATED LANGUAGE UNDERSTANDI;IG TECHNIQUES TO THE GENERATION OF DATA BASE ELEMENTS"

Thus, a report on some of daily message t r a f f i c in a m i l i t a r y environment. launch operation can consist of an i n i t i a l , rather The approach taken leans heavily on theoretical ad-' skeletal statement, followed by one or more messages vances in several disciplines, including l i n g u i s t i c s , received over a period of time, which update the prevcomputational linguistics, a r t i f i c i a l intelligence, ious report,. | AN APPLICATION OF AUTOMATED LANGUAGE UNDERSTANDING TECHNIQUES TO THE GENERATION OF DATA BASE ELEMENTS Georgette Silva Christine Montoomerv. and Don Dwiggins Operating Systems Inc. 21031 Ventura Boulevard Woodland Hills CA 91364 This paper defines a methodology for automatically analyzing textual reports of events and synthesizing event data elements from the reports for automated input to a data base. The long-term goal of the work described is to develop a support technology for specific analytical functions related to the evaluation of daily message traffic in a military environment. The approach taken leans heavily on theoretical ad- vances in several disciplines Including linguistics computational linguistics artificial intelligence and cognitive psychology. The aim is to model the cognitive activities of the human analyst as he reads and understands message text distilling its contents into information items of interest to him and building a conceptual model of the information conveyed by the message. This methodology although developed on the basis of a restricted subject domain is presumed to be general and extensible to other domains. Our approach is centered around the notion of event and utilizes two major knowledge sources 1 a model of the sublanguage for event reporting which characterizes the message traffic and 2 a model of the analyst-user1s conceptualization of the world . a model of the entities and relations characteristic of his world . THE SUBLANGUAGE The two sublanguage domains studied thus far consist of descriptions of events involving aircraft activities and launchings of missiles and satellites. The source data are contained in the text portions of military messages typical of these subject domains consisting of a report title summarizing a given event followed by one or more declarative sentences describing that event and optionally other related events . Both the semantics and the syntax of these event descriptions are constrained by .