<mapping name="property" class="org.alfresco.repo.dictionary.M2Property">
  <!--
    ...
  -->
  <structure name="index" usage="optional">
    <value style="attribute" name="enabled" field="isIndexed"/>
    <value name="atomic" field="isIndexedAtomically" usage="optional"/>
    <value name="stored" field="isStoredInIndex" usage="optional"/>
    <value name="compressed" field="isCompressedWhenStoredInIndex" usage="optional"/>