/**
                             * Extends DataSource with schema-parsing on XML data.
                             *
                             * @module datasource
                             * @submodule datasource-xmlschema
                             */
                            
                            /**
                             * Adds schema-parsing to the DataSource Utility.
                             * @class DataSourceXMLSchema
                             * @extends Plugin.Base
                             */
                            var DataSourceXMLSchema = function() {
                                DataSourceXMLSchema.superclass.constructor.apply(this, arguments);
                            };
                            
                            Y.mix(DataSourceXMLSchema, {
                                /**
                                 * The namespace for the plugin. This will be the property on the host which
                                 * references the plugin instance.
                                 *
                                 * @property NS
                                 * @type String
                                 * @static
                                 * @final
                                 * @value "schema"
                                 */
                                NS: "schema",
                            
                                /**
                                 * Class name.
                                 *
                                 * @property NAME
                                 * @type String
                                 * @static
                                 * @final
                                 * @value "dataSourceXMLSchema"
                                 */
                                NAME: "dataSourceXMLSchema",
                            
                                /////////////////////////////////////////////////////////////////////////////
                                //
                                // DataSourceXMLSchema Attributes
                                //
                                /////////////////////////////////////////////////////////////////////////////
                            
                                ATTRS: {
                                    schema: {
                                        //value: {}
                                    }
                                }
                            });
                            
                            Y.extend(DataSourceXMLSchema, Y.Plugin.Base, {
                                /**
                                * Internal init() handler.
                                *
                                * @method initializer
                                * @param config {Object} Config object.
                                * @private
                                */
                                initializer: function(config) {
                                    this.doBefore("_defDataFn", this._beforeDefDataFn);
                                },
                            
                                /**
                                 * Parses raw data into a normalized response.
                                 *
                                 * @method _beforeDefDataFn
                                 * @param tId {Number} Unique transaction ID.
                                 * @param request {Object} The request.
                                 * @param callback {Object} The callback object with the following properties:
                                 *     <dl>
                                 *         <dt>success (Function)</dt> <dd>Success handler.</dd>
                                 *         <dt>failure (Function)</dt> <dd>Failure handler.</dd>
                                 *     </dl>
                                 * @param data {Object} Raw data.
                                 * @protected
                                 */
                                _beforeDefDataFn: function(e) {
                                    var schema = this.get('schema'),
                                        payload = e.details[0],
                                        // TODO: Do I need to sniff for DS.IO + responseXML.nodeType 9?
                                        data = Y.XML.parse(e.data.responseText) || e.data;
                            
                                    payload.response = Y.DataSchema.XML.apply.call(this, schema, data) || {
                                        meta: {},
                                        results: data
                                    };
                            
                                    this.get("host").fire("response", payload);
                            
                                    return new Y.Do.Halt("DataSourceXMLSchema plugin halted _defDataFn");
                                }
                            });
                            
                            Y.namespace('Plugin').DataSourceXMLSchema = DataSourceXMLSchema;