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<![endif]--><script type="text/javascript" src="common/browserDetect.js"></script><script type="text/javascript" src="common/jquery/jquery-1.7.2.min.js"></script><script type="text/javascript" src="common/jquery/jquery.ui.all.js"></script><script type="text/javascript" src="common/jquery/jquery.cookie.js"></script><script type="text/javascript" src="common/jquery/treeview/jquery.treeview.min.js"></script><script type="text/javascript" src="common/jquery/layout/jquery.layout.js"></script><script type="text/javascript" src="search/l10n.js"></script><script type="text/javascript" src="search/htmlFileInfoList.js"></script><script type="text/javascript" src="search/nwSearchFnt.js"></script><script type="text/javascript" src="search/stemmers/en_stemmer.js"><!--//make this scalable to other languages as well.--></script><script type="text/javascript" src="search/index-1.js"></script><script type="text/javascript" src="search/index-2.js"></script><script type="text/javascript" src="search/index-3.js"></script></head><body><noscript><div id="noscript">JavaScript is disabled on your browser. Please enable JavaScript to enjoy all the features of this site.</div></noscript><div id="header"><a href="index.html"><img style="margin-right: 2px; height: 59px; padding-right: 25px; padding-top: 8px" align="right" src="common/images/logo.png" alt=" Documentation"></img></a><h1>Recoll user manual<br></br>The main configuration file, recoll.conf</h1><div id="navheader"><table class="navLinks"><tr><td><a id="showHideButton" href="#" onclick="myLayout.toggle('west')" class="pointLeft" tabindex="5" title="Hide TOC tree">Sidebar
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<a accesskey="n" class="navLinkNext" tabindex="5" href="RCL.INSTALL.CONFIG.RECOLLCONF.STORAGE.html">Next</a></td></tr></table></div></div><div id="content"><div class="sect3"><div class="titlepage"><div><div><h4 class="title"><a id="RCL.INSTALL.CONFIG.RECOLLCONF.TERMS"></a>Parameters affecting how we generate terms:</h4></div></div></div><p>Changing some of these parameters will imply a full
reindex. Also, when using multiple indexes, it may not make sense
to search indexes that don't share the values for these parameters,
because they usually affect both search and index operations.</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="varname">indexStripChars</code></span></dt><dd><p>Decide if we strip characters of diacritics and
convert them to lower-case before terms are indexed. If we
don't, searches sensitive to case and diacritics can be
performed, but the index will be bigger, and some marginal
weirdness may sometimes occur. The default is a stripped
index (<code class="literal">indexStripChars = 1</code>) for
now. When using multiple indexes for a search,
this parameter must be defined identically for
all. Changing the value implies an index reset.</p></dd><dt><span class="term"><code class="varname">maxTermExpand</code></span></dt><dd><p>Maximum expansion count for a single term (e.g.:
when using wildcards). The default of 10000 is reasonable and
will avoid queries that appear frozen while the engine is
walking the term list.</p></dd><dt><span class="term"><code class="varname">maxXapianClauses</code></span></dt><dd><p>Maximum number of elementary clauses we can add
to a single Xapian query. In some cases, the result of term
expansion can be multiplicative, and we want to avoid using
excessive memory. The default of 100 000 should be both
high enough in most cases and compatible with current
typical hardware configurations.</p></dd><dt><span class="term"><code class="varname">nonumbers</code></span></dt><dd><p>If this set to true, no terms will be generated
for numbers. For example "123", "1.5e6", 192.168.1.4, would not
be indexed ("value123" would still be). Numbers are often quite
interesting to search for, and this should probably not be set
except for special situations, ie, scientific documents with huge
amounts of numbers in them. This can only be set for a whole
index, not for a subtree.</p></dd><dt><span class="term"><code class="varname">dehyphenate</code></span></dt><dd><p>Determines if, given an input of
<code class="literal">co-worker</code>, we add a term for
<code class="literal">coworker</code>. This possibility is new in version
1.22, and on by default. Setting the variable to off allows
restoring the previous behaviour.</p></dd><dt><span class="term"><code class="varname">nocjk</code></span></dt><dd><p>If this set to true, specific east asian
(Chinese Korean Japanese) characters/word splitting is
turned off. This will save a small amount of cpu if you
have no CJK documents. If your document base does include
such text but you are not interested in searching it,
setting <code class="varname">nocjk</code> may be a significant time
and space saver.</p></dd><dt><span class="term"><code class="varname">cjkngramlen</code></span></dt><dd><p>This lets you adjust the size of n-grams
used for indexing CJK text. The default value of 2 is
probably appropriate in most cases. A value of 3 would
allow more precision and efficiency on longer words, but
the index will be approximately twice as large.</p></dd><dt><span class="term"><code class="varname">indexstemminglanguages</code></span></dt><dd><p>A list of languages for which the stem
expansion databases will be built. See <span class="citerefentry"><span class="refentrytitle">recollindex</span>(1)</span> or use the
<span class="command"><strong>recollindex</strong></span> <code class="option">-l</code> command
for possible values. You can add a stem expansion database
for a different language by using
<span class="command"><strong>recollindex</strong></span> <code class="option">-s</code>, but it
will be deleted during the next indexing. Only languages
listed in the configuration file are permanent.</p></dd><dt><span class="term"><code class="varname">defaultcharset</code></span></dt><dd><p>The name of the character set used for
files that do not contain a character set definition (ie:
plain text files). This can be redefined for any
sub-directory. If it is not set at all, the character set
used is the one defined by the nls environment (
<code class="envar">LC_ALL</code>, <code class="envar">LC_CTYPE</code>,
<code class="envar">LANG</code>), or <code class="literal">iso8859-1</code>
if nothing is set.</p></dd><dt><span class="term"><code class="varname">unac_except_trans</code></span></dt><dd><p>This is a list of characters, encoded in UTF-8,
which should be handled specially when converting text to
unaccented lowercase. For example, in Swedish, the letter
<code class="literal">a with diaeresis</code> has full alphabet
citizenship and should not be turned into an
<code class="literal">a</code>. Each element in the space-separated list
has the special character as first element and the translation
following. The handling of both the lowercase and upper-case
versions of a character should be specified, as appartenance to
the list will turn-off both standard accent and case
processing. Example for Swedish:</p><pre class="programlisting">
unac_except_trans = ���� ���� ���� ���� ���� ����
</pre><p>Note that the translation is not limited to a single
character, you could very well have something like
<code class="literal">��ue</code> in the list.</p><p>The default value set for
<code class="literal">unac_except_trans</code> can't be listed here
because I have trouble with SGML and UTF-8, but it only
contains ligature decompositions: german ss, oe, ae, fi,
fl.</p><p>This parameter can't be defined for subdirectories, it
is global, because there is no way to do otherwise when
querying. If you have document sets which would need different
values, you will have to index and query them separately.</p></dd><dt><span class="term"><code class="varname">maildefcharset</code></span></dt><dd><p>This can be used to define the default
character set specifically for email messages which don't
specify it. This is mainly useful for readpst (libpst) dumps,
which are utf-8 but do not say so.</p></dd><dt><span class="term"><code class="varname">localfields</code></span></dt><dd><p>This allows setting fields for all documents
under a given directory. Typical usage would be to set an
"rclaptg" field, to be used in <code class="filename">mimeview</code> to
select a specific viewer. If several fields are to be set, they
should be separated with a semi-colon (';') character, which there
is currently no way to escape. Also note the initial semi-colon.
Example:
<code class="literal">localfields= ;rclaptg=gnus;other = val</code>, then
select specifier viewer with
<code class="literal">mimetype|tag=...</code> in
<code class="filename">mimeview</code>.</p></dd><dt><span class="term"><code class="varname">testmodifusemtime</code></span></dt><dd><p>If true, use mtime instead of default ctime to
determine if a file has been modified (in addition to
size, which is always used). Setting this can reduce
re-indexing on systems where extended attributes are
modified (by some other application), but not indexed
(changing extended attributes only affects
ctime). Notes:
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>This may prevent detection of change
in some marginal file rename cases (the target would
need to have the same size and
mtime).</p></li><li class="listitem"><p>You should probably also set
noxattrfields to 1 in this case, except if you still
prefer to perform xattr indexing, for example if the
local file update pattern makes it of value (as in
general, there is a risk for pure extended attributes
updates without file modification to go
undetected).</p></li></ul></div><p>
Perform a full index reset after changing the value of
this parameter.
</p></dd><dt><span class="term"><code class="varname">noxattrfields</code></span></dt><dd><p>Recoll versions 1.19 and later
automatically translate file extended attributes into
document fields (to be processed according to the
parameters from the <code class="filename">fields</code>
file). Setting this variable to 1 will disable the
behaviour.</p></dd><dt><a id="RCL.INSTALL.CONFIG.RECOLLCONF.METADATACMDS"></a><span class="term"><code class="varname">metadatacmds</code></span></dt><dd><p>This allows executing external commands
for each file and storing the output in <span class="application">Recoll</span> document
fields. This could be used for example to index
external tag data. The value is a list of field names
and commands, don't forget an initial
semi-colon. Example:
</p><pre class="programlisting">
[/some/area/of/the/fs]
metadatacmds = ; tags = tmsu tags %f; otherfield = somecmd -xx %f
</pre><p>
</p><p>As a specially disgusting hack brought by
<span class="application">Recoll</span> 1.19.7, if a "field name" begins
with <code class="literal">rclmulti</code>, the data returned by
the command is expected to contain multiple field
values, in configuration file format. This allows
setting several fields by executing a single
command. Example:
</p><pre class="programlisting">
metadatacmds = ; rclmulti1 = somecmd %f
</pre><p>
If <code class="literal">somecmd</code> returns data in the form
of:
</p><pre class="programlisting">
field1 = value1
field2 = value for field2
</pre><p>
<code class="literal">field1</code>
and <code class="literal">field2</code> will be set inside the
document metadata.</p></dd></dl></div></div><script type="text/javascript" src="common/main.js"></script><script type="text/javascript" src="common/splitterInit.js"></script><div class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="RCL.INSTALL.CONFIG.RECOLLCONF.FILES.html">Prev</a>��</td><td width="20%" align="center"><a accesskey="u" href="RCL.INSTALL.CONFIG.RECOLLCONF.html">Up</a></td><td width="40%" align="right">��<a accesskey="n" href="RCL.INSTALL.CONFIG.RECOLLCONF.STORAGE.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">��</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">��</td></tr></table></div></div><div id="sidebar"><div id="leftnavigation" style="padding-top:3px;"><div id="tabs"><ul><li><a href="#treeDiv" style="outline:0;" tabindex="1"><span class="contentsTab">Contents</span></a></li><li><a href="#searchDiv" style="outline:0;" tabindex="1" onclick="doSearch()"><span class="searchTab">Search</span></a></li></ul><div id="treeDiv"><img src="common/images/loading.gif" alt="loading table of contents..." id="tocLoading" style="display:block;"></img><div id="ulTreeDiv" style="display:none"><ul id="tree" class="filetree"><li><span class="file"><a href="RCL.INTRODUCTION.html" tabindex="1">Introduction</a></span><ul><li><span class="file"><a href="RCL.INTRODUCTION.TRYIT.html" tabindex="1">Giving it a try</a></span></li><li><span class="file"><a href="RCL.INTRODUCTION.SEARCH.html" tabindex="1">Full text search</a></span></li><li><span class="file"><a href="RCL.INTRODUCTION.RECOLL.html" tabindex="1">Recoll overview</a></span></li></ul></li><li><span class="file"><a href="RCL.INDEXING.html" tabindex="1">Indexing</a></span><ul><li><span class="file"><a href="RCL.INDEXING.INTRODUCTION.html" tabindex="1">Introduction</a></span><ul><li><span class="file"><a href="RCL.INDEXING.INTRODUCTION.MODES.html" tabindex="1">Indexing modes</a></span></li><li><span class="file"><a href="RCL.INDEXING.INTRODUCTION.CONFIG.html" tabindex="1">Configurations, multiple indexes</a></span></li><li><span class="file"><a href="ch02s01s03.html" tabindex="1">Document types</a></span></li><li><span class="file"><a href="ch02s01s04.html" tabindex="1">Indexing failures</a></span></li><li><span class="file"><a href="ch02s01s05.html" tabindex="1">Recovery</a></span></li></ul></li><li><span class="file"><a href="RCL.INDEXING.STORAGE.html" tabindex="1">Index storage</a></span><ul><li><span class="file"><a href="RCL.INDEXING.STORAGE.FORMAT.html" tabindex="1">Xapian index formats</a></span></li><li><span class="file"><a href="RCL.INDEXING.STORAGE.SECURITY.html" tabindex="1">Security aspects</a></span></li></ul></li><li><span class="file"><a href="RCL.INDEXING.CONFIG.html" tabindex="1">Index configuration</a></span><ul><li><span class="file"><a href="RCL.INDEXING.CONFIG.MULTIPLE.html" tabindex="1">Multiple indexes</a></span></li><li><span class="file"><a href="RCL.INDEXING.CONFIG.SENS.html" tabindex="1">Index case and diacritics sensitivity</a></span></li><li><span class="file"><a href="RCL.INDEXING.CONFIG.GUI.html" tabindex="1">The index configuration GUI</a></span></li></ul></li><li><span class="file"><a href="RCL.INDEXING.WEBQUEUE.html" tabindex="1">Indexing WEB pages you wisit</a></span></li><li><span class="file"><a href="RCL.INDEXING.EXTATTR.html" tabindex="1">Extended attributes data</a></span></li><li><span class="file"><a href="RCL.INDEXING.EXTTAGS.html" tabindex="1">Importing external tags</a></span></li><li><span class="file"><a href="RCL.INDEXING.PERIODIC.html" tabindex="1">Periodic indexing</a></span><ul><li><span class="file"><a href="RCL.INDEXING.PERIODIC.EXEC.html" tabindex="1">Running indexing</a></span></li><li><span class="file"><a href="RCL.INDEXING.PERIODIC.AUTOMAT.html" tabindex="1">Using cron to automate
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later)</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.THUMBNAILS.html" tabindex="1">Displaying thumbnails</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.PREVIEW.html" tabindex="1">The preview window</a></span><ul><li><span class="file"><a href="RCL.SEARCH.GUI.PREVIEW.SEARCH.html" tabindex="1">Searching inside the preview</a></span></li></ul></li><li><span class="file"><a href="RCL.SEARCH.GUI.FRAGBUTS.html" tabindex="1">The Query Fragments window</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.COMPLEX.html" tabindex="1">Complex/advanced search</a></span><ul><li><span class="file"><a href="RCL.SEARCH.GUI.COMPLEX.TERMS.html" tabindex="1">Avanced search: the "find" tab</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.COMPLEX.FILTER.html" tabindex="1">Avanced search: the "filter" tab</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.COMPLEX.HISTORY.html" tabindex="1">Avanced search 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href="RCL.SEARCH.SAVING.html" tabindex="1">Saving and restoring queries (1.21 and later)</a></span></li><li><span class="file"><a href="RCL.SEARCH.GUI.CUSTOM.html" tabindex="1">Customizing the search interface</a></span><ul><li><span class="file"><a href="RCL.SEARCH.GUI.CUSTOM.RESLIST.html" tabindex="1">The result list format</a></span><ul><li><span class="file"><a href="RCL.SEARCH.GUI.CUSTOM.RESLIST.html#RCL.SEARCH.GUI.CUSTOM.RESLIST.PARA" tabindex="1">The paragraph format</a></span></li></ul></li></ul></li></ul></li><li><span class="file"><a href="RCL.SEARCH.KIO.html" tabindex="1">Searching with the KDE KIO slave</a></span><ul><li><span class="file"><a href="RCL.SEARCH.KIO.INTRO.html" tabindex="1">What's this</a></span></li><li><span class="file"><a href="RCL.SEARCH.KIO.SEARCHABLEDOCS.html" tabindex="1">Searchable documents</a></span></li></ul></li><li><span class="file"><a href="RCL.SEARCH.COMMANDLINE.html" tabindex="1">Searching on the command line</a></span></li><li><span 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