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What is Query Expansion

Handbook of Research on Fuzzy Information Processing in Databases
Given a similarity relation over query terms, expansion of a query refers to the addition of similar terms to the query, leading to a relaxed query and an extended answer.
Published in Chapter:
Query Expansion by Taxonomy
Troels Andreasen (Roskilde University, Denmark) and Henrik Bulskov (Roskilde University, Denmark)
Copyright: © 2008 |Pages: 25
DOI: 10.4018/978-1-59904-853-6.ch013
The use of taxonomies and ontologies as a foundation for enhancing textual information base access has recently gained increased attention in the field of information retrieval. The objective is to provide a domain model of an application domain where key concepts are organized and related. If queries and information base objects can be mapped to this, then the ontology may provide a valuable basis for a means of query evaluation that matches conceptual content rather than just strings, words, and numbers. This chapter presents an overview of the use of taxonomies and ontologies in querying with a special emphasis on similarity derived from the ontology. The notion of ontology is briefly introduced and similarity is surveyed. The former can be considered a generalization of taxonomy, while the latter can be seen as an interpretation where aspects of formal reasoning are ignored and replaced by measures reflecting how close concepts are connected, thereby significantly enhancing performance. In turn, similarity measures can be used in conceptual querying. Queries can be expanded with similar concepts, thereby causing query evaluation to be based on concepts from the domain model rather than on words in the query.
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More Results
Term Ordering-Based Query Expansion Technique for Hindi-English CLIR System
Query Expansion is the process of adding suitable in a query that helps in improving the efficiency of query.
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Geographically-Aware Information Retrieval on the Web
The task of modifying a user query to include additional arguments which have not been mentioned by the user.
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Retrieving Non-Latin Information in a Latin Web: The Case of Greek
A process of adding new terms to a given query in an attempt to provide better contextualization and hopefully retrieve documents which are more useful to the user.
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