var productModel = kendo.data.Model.define({
    id: "ProductID",
    fields: {
        ProductID: { editable: false, nullable: true },
        ProductName: { validation: { required: true } },
        UnitPrice: { type: "number", validation: { required: true, min: 1, max: 999} },
        UnitsInStock: { type: "number", validation: { min: 0, required: true } },
        Discontinued: { type: "boolean" }
    }
})