Queries
Packages 
Package Description
org.apache.lucene.queries
Filters and Queries that add to core Lucene.
org.apache.lucene.queries.function
Queries that compute score based upon a function.
org.apache.lucene.queries.function.docvalues
FunctionValues for different data types.
org.apache.lucene.queries.function.valuesource
A variety of functions to use with FunctionQuery.
org.apache.lucene.queries.mlt
Document similarity query generators.
org.apache.lucene.queries.payloads
The payloads package provides Query mechanisms for finding and using payloads.