lucene-java-3.4.0/lucene/contrib/xml-query-parser/README.htm

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   3                 <h1>XML based query syntax
   4                 </h1>
   5                 <p>
   6                         This module contains:
   7                         <ul>
   8                                 <li>a modular Lucene Query Parser where queries are expressed as XML</li>
   9                                 <li>JUnit test</li>
  10                                 <li>DTD schemas and <a href="docs/index.html">generated documentation</a> </li>
  11                                 <li>Example XML queries</li>
  12                                 <li>Test index (subset of Reuters 21578)</li>
  13                         </ul>
  14                 </p>
  15                 <p>
  16                         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>.
  17                 </p>
  18                 <p>
  19                         Parser support includes:
  20                         <ul>
  21                                 <li>"Span" queries</li>
  22                                 <li>Simple caching for filters</li>
  23                                 <li>"Like this" queries</li>
  24                                 <li>Boolean, Term, and UserInput (parsed with existing query parser)</li>
  25                                 <li>BoostingQuery - a class that can downgrade scores for hits on
  26                                 certain terms rather than the hard-line approach taken by BooleanClause.Occurs.MUST_NOT</li>
  27                                 <li>FilteredQuery, RangeFilter, DuplicateFilter and "TermsFilter" for non-sequential terms</li>
  28                                 <li>"FuzzyLikeThis" a new query which is a cross between "LikeThis" and "fuzzy" but with
  29                                         better scoring of fuzzy terms than standard fuzzy queries</li>
  30                                 <li>A modular design with expandable support for new query/filter types</li>
  31                         </ul>
  32                 </p>
  33                 <p>This code is dependent on the "queries" contrib module although the "CoreParser" can be compiled with just Lucene core if required</p>
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