Example for MergeForm Activity

<Activity Name="MergeResults">
  <Start/>
  <Action>MergeForm</Action>
  <Description lang="en">Merge results from    Backend.</Description>
  <Parameter direction="in" name="InDocument" type="document"    eval="variable">inDoc</Parameter>
  <Parameter direction="in" name="InWiDocument" type="document"   eval="variable">wiDoc</Parameter>
  <Parameter direction="out" eval="constant" type="document"   name="OutDocument">outDoc</Parameter>
</Activity>