title: Tag Library supports namespace: http://java.sun.com/jsf/core, but no tag was defined for name: ajax
body: <p>Below page</p>
  
  <pre><code>&lt;%@ taglib prefix="h" uri="http://java.sun.com/jsf/html" %&gt;
  &lt;%@ taglib prefix="f" uri="http://java.sun.com/jsf/core" %&gt;
  &lt;h:form&gt;
      &lt;h:outputLabel id="outtxt" value="#{user.name}"/&gt;
      &lt;h:inputText id="intxt" value="#{user.name}"&gt;
          &lt;f:ajax event="keyup" execute="intxt" render="outtxt"/&gt;
      &lt;/h:inputTtext&gt;
  &lt;/h:form&gt;
  </code></pre>
  
  <p>Throws below error</p>
  
  <blockquote>
    <p>Tag Library supports namespace: <a href="http://java.sun.com/jsf/core" rel="nofollow">http://java.sun.com/jsf/core</a>, but no tag was defined for name: ajax</p>
  </blockquote>
  
  <p>How is this caused and how can I solve it?</p>