 the extracted attribute value converted to the event category. </p>
<div class="refsect2">
<a name="idm66719"></a><h3>
<a name="boost.log.sinks.event_log.direct_event_cate_idm32894construct-copy-destruct"></a><code class="computeroutput">direct_event_category_mapping</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm32903-bb"></a><span class="