<simpleType name="rainPhaseType">
  <restriction base="string">
    <enumeration value="rain"/>
    <enumeration value="snow"/>
    <enumeration value="fog"/>
    <enumeration value="sleet"/>
    <enumeration value="hail"/>
    <enumeration value="freezing-precipitation"/>
    <enumeration value="drizzle"/>
    <enumeration value="mixed"/>
    <enumeration value="unknown"/>
  </restriction>
</simpleType>