PageEnvelope.DEFAULT_PREFIX, document);
Element documentElement = namespaceHelper.getDocument().getDocumentElement();
metaElement = namespaceHelper.getFirstChild(documentElement, META_ROOT);
if (metaElement == null) {
metaElement = namespaceHelper.createElement(META_ROOT);
Element[] children = DocumentHelper.getChildren(documentElement);
if (children.length == 0) {
documentElement.appendChild(metaElement);
} else {
documentElement.insertBefore(metaElement, children[0]);