ee_class</span></code> provide statically known
        IDs for the rules required by X3 to perform its tasks. In addition to that,
        the rule class can also be extended to have some user-defined customization
        hooks that are called:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            On success: After a rule sucessfully parses an input.
          </li>
<li class="listitem">
            On Error: After a rule fails to 