t;</span> <span class="identifier">MappedT</span> <span class="special">&gt;</span>
<span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">AttributeValueT</span>        <a name="boost.log.sinks.basic_custom_mapping.attribute_value_type"></a><span class="identifier">attribute_value_type</span><span class="special">;</span>  <span class="comment">// Attribute contai