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Topic Detection and Tracking with Spatio-Temporal Evidence

TitleTopic Detection and Tracking with Spatio-Temporal Evidence
Publication TypeConference Paper
Year of Publication2003
AuthorsMakkonen, J, Ahonen-Myka, H, Salmenkivi, M
Conference Name25th European Conference on Information Retrieval Research (ECIR 2003)
Keywordstopic detection, topic tracking

Topic Detection and Tracking is an event-based information organization task where online news streams are monitored in order to spot new unreported events and link documents with previously detected events. The detection has proven to perform rather poorly with traditional information retrieval approaches. We present an approach that formalizes temporal expressions and augments spatial terms with ontological information and uses this data in the detection. In addition, instead using a single term vector as a document representation, we split the terms into four semantic classes and process and weigh the classes separately. The approach is motivated by experiments.