<match value="[0-9]{5,5}" type="regex" offset="0">
        <match value="45" type="string" offset="20">
          <!-- bibliographic -->
          <match value="[acdnp][acdefgijkmoprt][abcdims]" type="regex" offset="5"/>
          <!-- authority-->
          <match value="[acdnosx]z" type="regex" offset="5"/>
          <!-- holdings -->
          <match value="[cdn][uvxy]" type="regex" offset="5"/>
          <!-- classification -->