The "xs:boolean" is an XML schema type, which accoridng to the XML schema spec http://www.w3.org/TR/xmlschema-2/ , can have the following legal literals {true, false, 1, 0}. But it has nothing to do with how IXMLDOMElement::setAttribute() interprets
boolean type VARIANT, which only involves XML DOM but not XML schema. An example of using "xs:boolean" is XML schema validation. With a simple ...