<SetVariable Name="$(Bilgilendirilecekler)">
  <Value />
</SetVariable>
<ForEach Node="/*/processingInfo/workItem[not(completedBy = preceding-sibling::workItem/completedBy)]">
  <SetVariable Name="$(Bilgilendirilecekler)">
    <Value Culture="" Target="None">eval::concat('$(Bilgilendirilecekler)', completedBy, ';')</Value>
  </SetVariable>
</ForEach>
<SetVariable Name="$(length)">
  <Math Operator="Subtract">
    <Math Operator="Multiply">
      <Evaluate Target="None" Culture="">count(/*/processingInfo/workItem[not(completedBy = preceding-sibling::workItem/completedBy)])</Evaluate>
      <Value>37</Value>
    </Math>
    <Value>1</Value>
  </Math>
</SetVariable>
<SetVariable Name="$(Bilgilendirilecekler)">
    <Value Culture="" Target="None">eval::substring('$(Bilgilendirilecekler)',0,'$(length)')</Value>
 
</SetVariable>
<Value>$(Bilgilendirilecekler)</Value>