code: private Expression xorOp(Data data) throws TemplateException {
  	Expression expr = orOp(data);
  	while (data.srcCode.forwardIfCurrentAndNoWordAfter("xor")) {
  	    comments(data);
  	    expr = data.factory.opBool(expr, orOp(data), Factory.OP_BOOL_XOR);
  	}
  	return expr;
      }
docs: Transfomiert eine Xor (xor) Operation. <br />
  EBNF:<br />
  <code>orOp {"xor" spaces  orOp};</code>
  
  @return CFXD Element
  @throws TemplateException