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Utilizing Temporal Information in Topic Detection And Tracking

TitleUtilizing Temporal Information in Topic Detection And Tracking
Publication TypeConference Paper
Year of Publication2003
AuthorsMakkonen J, Ahonen-Myka H
EditorKoch T, Sølvberg I T
Conference NameResearch and Advanced Technology for Digital Libraries, 7th European Conference, ECDL 2003
Conference LocationTrondheim, Norway
ISBN Number978-3-540-40726-3
Keywordsinformation extraction

The harnessing of time-related information from text for the use of information retrieval requires a leap from the surface forms of the expressions to a formalized time-axis. Often the expressions are used to form chronological sequences of events. However, we want to be able to determine the temporal similarity, i.e., the overlap of temporal references of two documents and use this similarity in Topic Detection and Tracking, for example. We present a methodology for extraction of temporal expressions and a scheme of comparing the temporal evidence of the news documents. We also examine the behavior of the temporal expressions and run experiments on English News corpus.