An NF2 Relational Interface for Document Retrieval, Restructuring and Aggregation
Kalervo Järvelin# and Timo Niemi+
# Department of Information Studies
+ Dept. of Computer Science
University of Tampere
P.O.Box 607
FIN-33101 TAMPERE, Finland
# kalervo.jarvelin@uta.fi
+ tn@cs.uta.fi
Fox, E. A. & Ingwersen, P. & Fidel, R. (Eds.), The 18th International Conference on Research and Development in Information Retrieval (ACM SIGIR '95), Seattle, Wa, July 9-12, 1995. New York, NY: ACM, 1995, pp. 102-110.
Abstract
Complex documents are used in many environments, e.g., information retrieval (IR). Such documents contain subdocuments, which may contain further subdocuments, etc. 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.
Subject categories: H.1.2, H.2.4, H.3.3
Keywords: non-first normal-form relations, data restructuring, data aggregation, information retrieval
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