<tal:button i18n:domain="silva">
  <a accesskey="#"
     tal:attributes="title view/help;
                     href string:${context/@@absolute_url}/edit/${view/tab};
                     class python:view.selected and 'selected' or None;
                     accesskey view/accesskey;">
    <span tal:replace="view/label"
          tal:condition="view/selected" />
    <spam tal:replace="view/formatedLabel"
          tal:condition="not:view/selected" />
  </a>
</tal:button>
