<element name="elementClass" type="diggs:ElementClassEnumExtType">
  <annotation>
    <documentation>The role a constructed element plays in the works, trial, test, production or sacrificial, as distinct from what it is made of or how it is built. It must be stated explicitly rather than inferred, because it governs which acceptance criteria apply and how a test result may be extrapolated. Values come from the enumerated list, or "Other: xx", where xx is a user-defined term whose meaning differs from every listed value (not a synonym of one).</documentation>
  </annotation>
</element>