Hi, without repeat all code before with your solution I've got the prevoius problem inside the file:
Qt Code: 
  1. <Light0 pos="4 1 4 1"  //wrong
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But if I use my prevoius code works (but i can put what Write() do only before tag PLAIN and not inside it....
Qt Code: 
  1. ..............................
  2. Write(QTextStream(&f));  
  3. QDomText t1 = doc.createTextNode("hello");
  4. .............
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