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SynEdit1.Highlighter := SynXMLSyn1;					

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 <?xml version="1.0" encoding="UTF-8"?>
 <APPROVAL>
   <ITEMTYPES
     GUTACHTEN='73,74,76'  <!-- An dieser Stelle gibt es den Fehler, hat irgendwie mit den Hochkommas was zu tun -->
   />
   <GUTACHTEN>
     <ATT1>APPROVAL1</ATT1>
     <ATT2>APPROVAL2</ATT2>
     <ATT3>APPROVAL3</ATT3>
     <PERIOD>DATAPPRAISAL</PERIOD>
     <VD1>Z_XNO_VALUATIONERTRAGSWERT_%ITEMTYPE%.B_%CURRENCY%_FAIRVALUEMAN_%ITEMTYPE%</VD1>
     <VD2>Z_XNO_VALUATIONERTRAGSWERT_%ITEMTYPE%.B_%CURRENCY%_FAIRVALUE_%ITEMTYPE%</VD2>
     <THIRDEYE>10000000000</THIRDEYE>
   </GUTACHTEN>
 </APPROVAL>					

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 <?xml version="1.0" encoding="UTF-8"?>
 <APPROVAL>
   <ITEMTYPES
     GUTACHTEN='73,74,76'
   />