d-regexp</code>,
<code>--fixed-strings</code>, or <code>--perl-regexp</code> option accordingly, while the
value <em>default</em> will return to the default matching behavior.</p>
</dd>
<dt class="hdlist1">grep.extendedRegexp</dt>
<dd>
<p>If set to true, enable <code>--extended-regexp</code> option by default. This
option is ignored when the <code>grep.patternType</code> option is set to a value
other than <em>default</em>.</p>
</dd>
<dt class="hdlist1">grep.threads</dt>
<dd>
<p>Number of grep worker thread