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doc.createTextNode(text)

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QDomNode node = doc.createTextNode( "a < b > c & d" );

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QDomNode node = doc.createCDATASection("a > b & c = <value>");

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    QString documentString;
    const QString value = "a > b & c = <value>";

    { // create DOM document
      QDomDocument doc;
      QDomNode rootNode = doc.createElement( "root" );
      doc.appendChild( rootNode );
      QDomText txtNode = doc.createCDATASection( value );
      rootNode.appendChild( txtNode );
      documentString = doc.toString();
    }

    { // read DOM document
      QDomDocument doc;
      doc.setContent( documentString );
      
      QDomNodeList childs = doc.childNodes();
      assert( childs.size() == 1 );

      QDomNode child = childs.at( 0 ); // root element
      QDomNode content = child.childNodes().at( 0 ); // content element
      assert( content.isText() );

      QDomText txtNode = content.toText();
      assert( value == txtNode.data() );
    }