: NLP Vocabulary: query expansion

NLP methods and tools > query expansion

query expansion

The information retrieval techniques that expand search terms to include other related terms that enhance original queries, in order to provide richer and more relevant results. (Based on Aklouche et al., Query Expansion Based on NLP and Word Embeddings)

As can be seen query expansion produces an impressive improvement in precision at all levels. (Strzalkowski, Wang & Wise, 1998)
One way to view query expansion is to make the user query resemble more closely the documents it is expected to retrieve. (Strzalkowski, Wang & Wise, 1998)
Other types of query expansions including general purpose thesauri or lexical databases (e.g. Wordnet) have been found generally unsuccessful in information retrieval (Voorhees 1994). (Strzalkowski, Wang & Wise, 1998)
Query expansion appears to produce consistently high gains not only for different sets of queries but. (Strzalkowski, Wang & Wise, 1998)

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