/**
                             * The Number Utility provides type-conversion and string-formatting
                             * convenience methods for Numbers.
                             *
                             * @module datatype-xml
                             * @submodule datatype-xml-format
                             */
                            
                            /**
                             * XML provides a set of utility functions to operate against XML documents.
                             *
                             * @class XML
                             * @static
                             */
                            var LANG = Y.Lang;
                            
                            Y.mix(Y.namespace("XML"), {
                                /**
                                 * Converts data to type XMLDocument.
                                 *
                                 * @method format
                                 * @param data {XMLDocument} Data to convert.
                                 * @return {String} String.
                                 */
                                format: function(data) {
                                    try {
                                        if(!LANG.isUndefined(data.getXml)) {
                                            return data.getXml();
                                        }
                            
                                        if(!LANG.isUndefined(XMLSerializer)) {
                                            return (new XMLSerializer()).serializeToString(data);
                                        }
                                    }
                                    catch(e) {
                                        if(data && data.xml) {
                                            return data.xml;
                                        }
                                        else {
                                            Y.log("Could not format data from type XML", "warn", "xml");
                                            return (LANG.isValue(data) && data.toString) ? data.toString() : "";
                                        }
                                    }
                                }
                            });
                            
                            Y.namespace("DataType");
                            Y.DataType.XML = Y.XML;