or
var readOrdersSource = new kendo.data.DataSource({ transport: { read: { url: webServiceBaseUrl + "getOrderedTransformers", contentType: 'application/json; charset=utf-8', type: "POST", dataType: "json" } }, schema: { data: "d", model: { id: "id", fields: { id: { type: "number" }, MaximoItemNumber: { type: "string" }, MaximoRequestNumber: { type: "string" }, AddedBy: { type: "string" }, AddDate: { type: "datetime" }, KVA: { type: "number" }, PrimaryVoltage: { type: "string" }, SecondaryVoltage: { type: "string" }, OilType: { type: "string" }, Phase: { type: "number" } } } }, group: { field: "MaximoRequestNumber" }, parameterMap: function (options) { return JSON.stringify(options) }});