A database approach to information retrieval: The remarkable relationship between language models and region models

Djoerd Hiemstra, V. Mihajlovic

Research output: Book/ReportReportProfessional

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Abstract

In this report, we unify two quite distinct approaches to information retrieval: region models and language models. Region models were developed for structured document retrieval. They provide a well-defined behaviour as well as a simple query language that allows application developers to rapidly develop applications. Language models are particularly useful to reason about the ranking of search results, and for developing new ranking approaches. The unified model allows application developers to define complex language modeling approaches as logical queries on a textual database. We show a remarkable one-to-one relationship between region queries and the language models they represent for a wide variety of applications: simple ad-hoc search, cross-language retrieval, video retrieval, and web search.
Original languageEnglish
Place of PublicationEnschede
PublisherCentre for Telematics and Information Technology (CTIT)
Number of pages20
Publication statusPublished - Aug 2005

Publication series

NameCTIT technical report series
PublisherCentre for Telematics and Information Technology, University of Twente
No.CTIT-TR-05-35
ISSN (Print)1381-3625

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