title: JSF - getExternalContext().getRequestParameterMap().get("id') returns null
body: <p><code>FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("compId")</code> returns null for <code>outputLable</code> and <code>outputText</code>, but not for <code>inputText</code> and <code>inputHidden</code>.
  Why is that and how do I get the value for outputLabel or outputText?</p>