Sample file structure

Sample-file--structure.xml

<headers...>
<featurecollection>
  <feature> # id with only new geometry, so new object 
    <id>1234</id>
    <type>new</type>
    <geometry>...gml...</geometry>
  </feature>
  <feature> # id with current and new geometries, so object change
    <id>1235</id>
    <type>current</type>
    <geometry>...gml...</geometry>
  </feature> 
  <feature>
    <id>1235</id>
    <type>new</type>
    <geometry>...gml...</geometry>
  </feature>
 <feature> # id with only current, so removal
    <id>1236</id>
    <type>current</type>
    <geometry>...gml...</geometry>
  </feature>
</featurecollection>