Include Example

<Study OID="S.001">
  <MetaDataVersion OID="MDV.001" Name="First Metadata version"> 
    <ItemGroupDef OID="IG.001" Name="First ItemGroup"> 
      <ItemRef ItemOID="I.001" Mandatory="Yes" OrderNumber="1"/> 
      <ItemRef ItemOID="I.002" Mandatory="Yes" OrderNumber="2"/> 
      <Alias Context="Context1" Name="IG1"/> 
      <Alias Context="Context2" Name="FIRST"/> 
    </ItemGroupDef> 
  </MetaDataVersion> 
  
  <MetaDataVersion OID="MDV.002" Name="Second Metadata version"> 
    <Include StudyOID="S.001" MetaDataVersionOID="MDV.001"/>
    <ItemGroupDef OID="IG.001" Name="First ItemGroup (modified)"> 
      <ItemRef ItemOID="I.001" Mandatory="Yes" OrderNumber="1"/> 
      <ItemRef ItemOID="I.003" Mandatory="Yes" OrderNumber="2"/> 
      <ItemRef ItemOID="I.002" Mandatory="Yes" OrderNumber="3"/> 
      <Alias Context="Context1" Name="IG1"/> 
    </ItemGroupDef> 
  </MetaDataVersion> 
</Study>