dnaber 2004/09/14 15:19:53
Modified: docs queryparsersyntax.html
. CHANGES.txt
xdocs queryparsersyntax.xml
Log:
document Christoph's improvements to FuzzyQuery
Revision Changes Path
1.28 +22 -1 jakarta-lucene/docs/queryparsersyntax.html
Index: queryparsersyntax.html
===================================================================
RCS file: /home/cvs/jakarta-lucene/docs/queryparsersyntax.html,v
retrieving revision 1.27
retrieving revision 1.28
diff -u -r1.27 -r1.28
--- queryparsersyntax.html 18 May 2004 13:32:00 -0000 1.27
+++ queryparsersyntax.html 14 Sep 2004 22:19:53 -0000 1.28
@@ -385,7 +385,28 @@
</tr>
</table>
</div>
- <p>This search will find terms like
foam and roams</p>
+ <p>This search will find terms like
foam and roams.</p>
+ <p>Starting with Lucene 1.9 an
additional (optional) parameter can specify the required similarity. The value is
between 0 and 1, with a value closer to 1 only terms with a higher similarity will be
matched. For 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>roam~0.8</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>The default that is used if the
parameter is not given is 0.5.</p>
</blockquote>
</td></tr>
<tr><td><br/></td></tr>
1.107 +7 -2 jakarta-lucene/CHANGES.txt
Index: CHANGES.txt
===================================================================
RCS file: /home/cvs/jakarta-lucene/CHANGES.txt,v
retrieving revision 1.106
retrieving revision 1.107
diff -u -r1.106 -r1.107
--- CHANGES.txt 5 Sep 2004 22:09:26 -0000 1.106
+++ CHANGES.txt 14 Sep 2004 22:19:53 -0000 1.107
@@ -11,7 +11,12 @@
2. FuzzyQuery now takes an additional parameter that specifies the
minimum similarity that is required for a term to match the query.
- Note that this isn't supported by QueryParser yet. (Daniel Naber)
+ The QueryParser syntax for this is term~x, where x is a floating
+ point number between 0 and 1 (a bigger number means that a higher
+ similarity is required). Furthermore, a prefix can be specified
+ for FuzzyQuerys so that only those terms are considered similar that
+ start with this prefix. This can speed up FuzzyQuery greatly.
+ (Daniel Naber, Christoph Goller)
3. The Russian and the German analyzers have been moved to Sandbox.
Also, the WordlistLoader class has been moved one level up in the
1.7 +5 -1 jakarta-lucene/xdocs/queryparsersyntax.xml
Index: queryparsersyntax.xml
===================================================================
RCS file: /home/cvs/jakarta-lucene/xdocs/queryparsersyntax.xml,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -r1.6 -r1.7
--- queryparsersyntax.xml 3 Oct 2003 03:01:05 -0000 1.6
+++ queryparsersyntax.xml 14 Sep 2004 22:19:53 -0000 1.7
@@ -88,7 +88,11 @@
<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 Single word Term. For example to search for a term similar in spelling to "roam" use
the fuzzy search: </p>
<source>roam~</source>
- <p>This search will find terms like foam and roams</p>
+ <p>This search will find terms like foam and roams.</p>
+
+ <p>Starting with Lucene 1.9 an additional (optional) parameter can specify
the required similarity. The value is between 0 and 1, with a value closer to 1 only
terms with a higher similarity will be matched. For example:</p>
+ <source>roam~0.8</source>
+ <p>The default that is used if the parameter is not given is 0.5.</p>
</subsection>
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