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From carl...@apache.org
Subject cvs commit: jakarta-lucene/docs queryparsersyntax.html
Date Wed, 15 May 2002 13:51:38 GMT
carlson     02/05/15 06:51:38

  Added:       docs     queryparsersyntax.html
  Log:
  Adding Query Parser Syntax to give people a better idea of what Lucene can do and does "out of the box".
  
  Revision  Changes    Path
  1.1                  jakarta-lucene/docs/queryparsersyntax.html
  
  Index: queryparsersyntax.html
  ===================================================================
  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  
  <!-- Content Stylesheet for Site -->
  
          
  <!-- start the processing -->
      <!-- ====================================================================== -->
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                                                      <meta name="author" value="Peter Carlson">
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              <title>Jakarta Lucene - 
              Query Parser Syntax - Jakarta Lucene 
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                                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Overview"><strong>Overview</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Although Lucene provides the ability to create your own query's though its API, it also provides a rich query language through the QueryParser.</p>
                                                  <p>This page provides syntax of Lucene's Query Parser, a lexer which interprets a string into a Lucene Query using JavaCC.</p>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                  <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Terms"><strong>Terms</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>A query is broken up into terms and operators. There are two types of terms: Single Terms and Phrases.</p>
                                                  <p>A Single Term is a single word such as "test" or "hello".</p>
                                                  <p>A Phrase is a group of words surrounded by double quotes such as "hello dolly".</p>
                                                  <p>Multiple terms can be combined together with Boolean operators to form a more complex query (see below).</p>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                  <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Fields"><strong>Fields</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene supports fielded data. When performing a search you can either specify a field, or use the default field. The field names and default field is implementation specific.</p>
                                                  <p>You can search any field by typing the field name followed by a colon ":" and then the term you are looking for. </p>
                                                  <p>As an example, let's assume a Lucene index contains two fields, title and text and text is the default field. 
          If you want to find the document entitled "The Right Way" which contains the text "don't go this way", you can enter: </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>title:&quot;The Right Way&quot; AND text:go</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>or</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>title:&quot;Do it right&quot; AND right</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>Since text is the default field, the field indicator is not required.</p>
                                                  <p>Note: The field is only valid for the term that it directly precedes, so the query</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>title:Do it right</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>Will only find "Do" in the title field. It will find "it" and "right" in the default field (in this case the text field). </p>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                  <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Term Modifiers"><strong>Term Modifiers</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene supports modifying query terms to provide a wide range of searching options.</p>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Wildcard Searches"><strong>Wildcard Searches</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene supports single and multiple character wildcard searches.</p>
                                                  <p>To perform a single character wildcard search use the "?" symbol.</p>
                                                  <p>To perform a multiple character wildcard search use the "*" symbol.</p>
                                                  <p>The single character wildcard search looks for terms that match that with the single character replaced. For example, to search for "text" or "test" you can use the search:</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>te?t</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>Multiple character wildcard searches looks for 0 or more characters. For example, to search for test, tests or tester, you can use the search: </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>test*</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>You can also use the wildcard searches in the middle of a term.</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>te*t</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>Note: You cannot use a * or ? symbol as the first character of a search.</p>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Fuzzy Searches"><strong>Fuzzy Searches</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene supports fuzzy searches based on the Levenshtein Distance, or Edit Distance algorithm. To do a fuzzy search use the tilde, "~", symbol at the end of a term. For example to search for a term similar in spelling to "roam" use the fuzzy search: </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>roam~</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>This search will find terms like foam and roams</p>
                                                  <p>Note:Terms found by the fuzzy search will automatically get a boost factor of 0.2</p>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Boosting a Term"><strong>Boosting a Term</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene provides the relevance level of matching documents based on the terms found. To boost a term use the caret, "^", symbol with a boost factor (a number) at the end of the term you are searching. The higher the boost factor, the more relevant the term will be.</p>
                                                  <p>Boosting allows you to control the relevance of a document by boosting its term. For example, if you are searching for</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>IBM Microsoft</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>and you want the term "IBM" to be more relevant boost it using the ^ symbol along with the boost factor next to the term. You would type:</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>IBM^4 Microsoft</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>This will make documents with the term IBM appear more relevant. You can also boost Phrase Terms as in the example: </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot;^4 &quot;Microsoft Excel&quot;</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>By default, the boost factor is 1.</p>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                  <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Boolean operators"><strong>Boolean operators</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Boolean operators allow terms to be combined through logic operators.
          Lucene supports AND, "+", OR, NOT and "-" as Boolean operators(Note: Boolean operators must be ALL CAPS).</p>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="OR"><strong>OR</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>The OR operator is the default conjunction operator. This means that if there is no Boolean operator between two terms, the OR operator is used. 
          The OR operator links two terms and finds a matching document if either of the terms exist in a document. This is equivalent to a union using sets.
          For example to search for documents that contain either "Microsoft Word" or just "Microsoft": </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot; Microsoft</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>or</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot; OR Microsoft</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="AND"><strong>AND</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>The AND operator matches documents where both terms exist anywhere in the text of a single document. 
          This is equivalent to an intersection using sets.
          For example to search for documents that contain "Microsoft Word" and "Microsoft Excel": </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot; AND &quot;Microsoft Excel&quot;</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="+"><strong>+</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>The "+" or required operator requires that the term after the "+" symbol exist somewhere in a the field of a single document. For example, to search for documents that contain jakarta or lucene:</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>+jakarta apache</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="NOT"><strong>NOT</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>The NOT operator excludes documents that contain the term after NOT.
          This is equivalent to a difference using sets.
          For example to search for documents that contain "Microsoft Word" but not "Microsoft Excel": </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot; NOT &quot;Microsoft Excel&quot;</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                      <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#828DA6">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="-"><strong>-</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>The "-" or prohibit operator excludes documents that contain the term after the "-" symbol. For example to search for documents that contain "Microsoft Word" but not "Microsoft Excel": </p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>&quot;Microsoft Word&quot; -&quot;Microsoft Excel&quot;</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                              </blockquote>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
                                                  <table border="0" cellspacing="0" cellpadding="2" width="100%">
        <tr><td bgcolor="#525D76">
          <font color="#ffffff" face="arial,helvetica,sanserif">
            <a name="Grouping"><strong>Grouping</strong></a>
          </font>
        </td></tr>
        <tr><td>
          <blockquote>
                                      <p>Lucene supports using parentheses to group clauses to form sub queries. This can be very useful if you want to control the boolean logic for a query.
          For example, to search for either "jakarta" or "apache" and "website":</p>
                                                      <div align="left">
      <table cellspacing="4" cellpadding="0" border="0">
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#ffffff"><pre>(jakarta OR apache) AND website</pre></td>
        <td bgcolor="#023264" width="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      <tr>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
        <td bgcolor="#023264" width="1" height="1"><img src="/images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"/></td>
      </tr>
      </table>
      </div>
                                                  <p>This eliminates any confusion and makes sure you that website must exist and either term jakarta or apache may exist.</p>
                              </blockquote>
          </p>
        </td></tr>
        <tr><td><br/></td></tr>
      </table>
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