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XML based query syntax -

- This module contains: -

a modular Lucene Query Parser where queries are expressed as XML
JUnit test
DTD schemas and generated documentation
Example XML queries
Test index (subset of Reuters 21578)

- The original motivation for creating this package was outlined and discussed here. -

- Parser support includes: -

"Span" queries
Simple caching for filters
"Like this" queries
Boolean, Term, and UserInput (parsed with existing query parser)
BoostingQuery - a class that can downgrade scores for hits on - certain terms rather than the hard-line approach taken by BooleanClause.Occurs.MUST_NOT
FilteredQuery, RangeFilter, DuplicateFilter and "TermsFilter" for non-sequential terms
"FuzzyLikeThis" a new query which is a cross between "LikeThis" and "fuzzy" but with - better scoring of fuzzy terms than standard fuzzy queries
A modular design with expandable support for new query/filter types

This code is dependent on the "queries" contrib module although the "CoreParser" can be compiled with just Lucene core if required

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