 align="center>"><b>t</b><p>
</td><td>Used to output the name of the thread that generated the logging event.<p>
<p>
</td></tr>
<tr>
<td align="center>"><b>x</b><p>
</td><td>Used to output the <a class="el" href="classlog4cxx_1_1_n_d_c.html">NDC</a> (nested diagnostic context) associated with the thread that generated the logging event.  <p>
</td></tr>
<tr>
<td align="center>"><b>X</b><p>
</td><td><p>
<p>
Used to output the <a class="el" href="classlog4cxx_1_1_m_d_c.html">MDC</a> (mapped diagnostic context)