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pylucene 3.5.0-3
[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / xml-query-parser / README.htm
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+<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" contrib module although the "CoreParser" can be compiled with just Lucene core if required</p>
+       </body>
+</html>
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