Running into an issue about parse/select XML node, It's working when there is no namespace in the XML. working

const xmlDocument = xml.Parser.fromString({
                text: '<?xml version="1.0" encoding="UTF-8"?><StandardBusinessDocument><HeaderVersion>1.0</HeaderVersion></StandardBusinessDocument>'
            });

// Return [Node]
xml.XPath.select({
            node: xmlDocument,
            xpath: '//HeaderVersion'
        });

however, when the XML contain namespace it can't select using XPath NOT working

const xmlDocument = xml.Parser.fromString({
                text: '<?xml version="1.0" encoding="UTF-8"?><StandardBusinessDocument xmlns="<http://www.qualifiednamespace.com/book>"><HeaderVersion>1.0</HeaderVersion></StandardBusinessDocument>'
            });

// Return []
xml.XPath.select({
            node: xmlDocument,
            xpath: '//HeaderVersion'
        });

Any idea is to appreciate