This module contains a number of filter and query objects that add to core lucene.

==== The "MoreLikeThis" class from the "similarity" module has been copied into here.

If people are generally happy with this move then the similarity module can be deleted, or at least a

"Moved to queries module..." note left in its place.

==== FuzzyLikeThis - mixes the behaviour of FuzzyQuery and MoreLikeThis but with special consideration

of fuzzy scoring factors. This generally produces good results for queries where users may provide details in a number of

fields and have no knowledge of boolean query syntax and also want a degree of fuzzy matching. The query is fast because, like

MoreLikeThis, it optimizes the query to only the most distinguishing terms.

==== BoostingQuery - effectively demotes search results that match a given query.

Unlike the "NOT" clause, this still selects documents that contain undesirable terms,

but reduces the overall score of docs containing these terms.

==== TermsFilter - Unlike a RangeFilter this can be used for filtering on multiple terms that are not necessarily in

a sequence. An example might be a collection of primary keys from a database query result or perhaps

a choice of "category" labels picked by the end user.

==== RegexQuery - Implements the regular expression term search query.

Mark Harwood

25/02/2006