title: Spring-Webflow Using a HTML link to signal an event
body: <p>I am playing around with Spring-Webflow (2.3), ZK (5.0.7.1) and ZK Spring (3.0).  </p>
  
  <p>Actually I'm trying to signal an event with a HTML link as described at <a href="http://static.springsource.org/spring-webflow/docs/2.3.x/reference/html/ch11s06.html" rel="noreferrer">Spring-Webflow</a>.  </p>
  
  <pre><code>&lt;a href="${flowExecutionUrl}&amp;_eventId=go2ProjectRoomView" &gt;2 Project&lt;/a&gt;
  </code></pre>
  
  <p>Part of my flow definition file looks like:</p>
  
  <pre><code>&lt;view-state id="mainView"&gt;
    &lt;transition on="go2ProjectRoomView" to="projectRoomView" bind="false"/&gt;
  &lt;/view-state&gt;
  
  &lt;view-state id="projectRoomView"&gt;
    &lt;transition on="go2MainView" to="mainView" bind="false"/&gt;
  &lt;/view-state&gt;
  </code></pre>
  
  <p>If I deploy my web project and navigate to the main view following error appears:</p>
  
  <pre><code>The reference to entity "_eventId" must end with the ';' delimiter
  </code></pre>
  
  <p>Same error happens if I replace <code>_eventId=go2ProjectRoomView</code> by <code>_eventId_go2ProjectRoomView</code>.</p>
  
  <p>Link to <a href="http://pastebin.com/bzHjyqDy" rel="noreferrer">full stack trace</a>.</p>