private static IDocument createDocumentWithSchema( final DocumentType documentType, final String rootElementName) { final String defaultNamespaceUri = documentType.getNamespaceName(); final Document document = new Document(new QualifiedName(defaultNamespaceUri, rootElementName)); final IElement root = document.getRootElement(); root.declareDefaultNamespace(defaultNamespaceUri); final WTPVEXValidator validator = new WTPVEXValidator(new DocumentContentModel(null, null, null, root)); int namespaceIndex = 1; for (final String namespaceUri : validator.getRequiredNamespaces()) { if (!defaultNamespaceUri.equals(namespaceUri)) { root.declareNamespace("ns" + namespaceIndex++, namespaceUri); } } return document; }