Package org.terrier.matching.models.queryexpansion

Provides the classes that implement various query expansion models.

Class Summary

Class	Description
BA	This class implements an approximation of the binomial distribution through the Kullback-Leibler divergence to weight query terms for query expansion.
Bo1	This class implements the Bo1 model for query expansion.
Bo2	This class implements the Bo2 model for query expansion.
Information	This class implements the Kullback-Leibler divergence for query expansion.
KL	This class implements the Kullback-Leibler divergence for query expansion.
KLComplete	This class implements the complete Kullback-Leibler divergence for query expansion.
KLCorrect	This class implements the correct Kullback-Leibler divergence for query expansion, which takes the contribution into consideration.
QueryExpansionModel	This class should be extended by the classes used for weighting terms and documents.
QueryExpansionModelFactory	A factory method for handling the initialisation of expansion models.