An NF2 Relational Interface with Aggregation Capability for Document Retrieval, Restructuring and Analysis
Kalervo Järvelin# and Timo Niemi+
#Department of Information Studies
+Department of Computer Science
University of Tampere
P.O.Box 607
FIN-33101 TAMPERE, Finland
University of Tampere, Department of Information Studies, RN-1994-2, December 1994. 25 p.
Abstract
Complex documents are used in many environments, including information retrieval (IR). Complex documents contain subdocuments, which may contain further subdocuments, etc. Therefore powerful tools are needed to facilitate their retrieval, restructuring, and analysis. Existing IR systems are poor in complex document restructuring and data aggregation. However, in practice, IR system users would often want to obtain aggregation information on subdocuments of complex documents. In this paper we address this problem and provide a truly declarative and powerful interface for the users. Our interface is based on the non-first-normal-form (NF2) relational model. It allows intuitive and systematic modeling of complex documents.
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