| <html> |
| <body> |
| <h1>XML based query syntax |
| </h1> |
| <p> |
| This module contains: |
| <ul> |
| <li>a modular Lucene Query Parser where queries are expressed as XML</li> |
| <li>JUnit test</li> |
| <li>DTD schemas and <a href="docs/index.html">generated documentation</a> </li> |
| <li>Example XML queries</li> |
| <li>Test index (subset of Reuters 21578)</li> |
| </ul> |
| </p> |
| <p> |
| The original motivation for creating this package was outlined and discussed <a href="http://marc.theaimsgroup.com/?l=lucene-dev&m=113355526731460&w=2">here</a>. |
| </p> |
| <p> |
| Parser support includes: |
| <ul> |
| <li>"Span" queries</li> |
| <li>Simple caching for filters</li> |
| <li>"Like this" queries</li> |
| <li>Boolean, Term, and UserInput (parsed with existing query parser)</li> |
| <li>BoostingQuery - a class that can downgrade scores for hits on |
| certain terms rather than the hard-line approach taken by BooleanClause.Occurs.MUST_NOT</li> |
| <li>FilteredQuery, RangeFilter, DuplicateFilter and "TermsFilter" for non-sequential terms</li> |
| <li>"FuzzyLikeThis" a new query which is a cross between "LikeThis" and "fuzzy" but with |
| better scoring of fuzzy terms than standard fuzzy queries</li> |
| <li>A modular design with expandable support for new query/filter types</li> |
| </ul> |
| </p> |
| <p>This code is dependent on the "queries" module although the "CoreParser" can be compiled with just Lucene core if required</p> |
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