Refining Query Expansion Terms using Query Context
Reuben Crimp, Andrew Trotman · 2018
Query expansion is commonly used to combat the vocabulary mismatch problem, it bridges the disparity between the vocabulary used in the corpus and search queries. However, if expansion terms are not chosen carefully, there is a risk of including spurious expansion terms, which can broaden the potential interpretations of the modified query. Unintentionally increasing the semantic ambiguity in this way is known as query drift.