ViewRowImpl.writeXML: not to omit null values

Question

Hi.
I want to use writeXML method in ViewRowImpl to get current row's data in XML format. Here is a snippet of my code
        Node rootNode = myViewRowImpl.writeXML(1, XMLInterface.XML_OPT_ALL_ROWS);
        StringWriter sw = new StringWriter();
        try {
            Transformer t = TransformerFactory.newInstance().newTransformer();
            t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
            t.setOutputProperty(OutputKeys.INDENT, "yes");
            t.transform(new DOMSource(rootNode), new StreamResult(sw));
        } catch (TransformerException te) {
            System.out.println("Transformer Exception");
        System.out.println(sw.toString());
...The problem is that there are missing tags of attributes which has null value (does not have a value). How to "force" writeXML method or even transformer to output empty tags for attributes that does not have values definied?
Thx
Regards

Answer 1

As per the doc.
38.7.3.2 Controlling Element Suppression for Null-Valued Attributes
By default, if a view row attribute is null, then its corresponding element is omitted from the generated XML. Select the attribute on the Attributes page of the overview editor and in the Property Inspector, select the Custom Properties navigation tab and set the custom attribute-level property named Xml Explicit Null to any value (e.g. "true" or "yes") to cause an element to be included for the attribute if its value is null. For example, if an attribute named AssignedDate has this property set, then a row containing a null assigned date will contain a corresponding AssignedDate null="true"/ element. If you want this behavior for all attributes of a view object, you can define the Xml Explicit Null custom property at the view object level as a shortcut for defining it on each attribute.