Exploiting underrepresented query aspects for automatic query expansion

Users attempt to express their search goals through web search queries. When a search goal has multiple components or aspects, documents that represent all the aspects are likely to be more relevant than those that only represent some aspects. Current web search engines often produce result sets whose top ranking documents represent only a subset of the query aspects. By expanding the query using the right keywords, the search engine can find documents that represent more query aspects and performance improves. This paper describes AbraQ, an approach for automatically finding the right keywords to expand the query. AbraQ identifies the aspects in the query, identifies which aspects are underrepresented in the result set of the original query, and finally, for any particularly underrepresented aspect, identifies keywords that would enhance that aspect's representation and automatically expands the query using the best one. The paper presents experiments that show AbraQ significant...

• Type: Conference
• Year: 2007
• Where: KDD
• Authors: Daniel Crabtree, Peter Andreae, Xiaoying Gao
• Keywords: Data Mining, KDD 2007, Keywords Query Expansion, Query Aspects, Query Expansion Techniques