source 源对象表示一组键/值对。

The source object represents a set of key/value pairs.
url: A string containing the URL to which the request is sent.
data: Data to be sent to the server.
localdata: data array or data string pointing to a local data source.
datatype: the data's type. Possible values: 'xml', 'json', 'jsonp', 'tsv', 'csv', 'local', 'array', 'observablearray'.
type: The type of request to make ("POST" or "GET"), default is "GET".
id: A string containing the Id data field.
root: A string describing where the data begins and all other loops begin from this element.
record: A string describing the information for a particular record.
datafields: An array describing the fields in a particular record. Each datafield must define the following members:
name - A string containing the data field's name.
type(optional) - A string containing the data field's type. Possible values: 'string', 'date', 'number', 'bool'.
format(optional) - Sets the data formatting. By setting the format, the jqxDataAdapter plug-in will try to format the data before loading it.
Example: { name: 'SubmitDate', type: 'date', format: "yyyy-MM-ddTHH:mm:ss-HH:mm" }
map(optional) - A mapping to the data field.

url：请求地址，即数据来源，例如当datatype类型为xml，即需要url请求到目标文件获取数据

var source = {
    datatype:"xml",
    url="../sampledata/products.xml"
}

data：发送到服务器的数据，目前还没有遇到，补充中...
localdata：本地数据，与url功能相同；
datatype：数据类型，如果用url获取数据，则需要确保datatype正确，用localdata则无要求，类型有 'xml', 'json', 'jsonp', 'tsv', 'csv', 'local', 'array', 'observablearray';
type：请求类型，post、get，默认为get；
id：用处不详？？？
root：即一条数据被什么元素包裹，

root："demo"
xml文件
<demo>
  <content type="application/xml">
     <m:properties>
         <d:ShipVia m:type="Edm.Int32">3</d:ShipVia>
         <d:Freight m:type="Edm.Decimal">32.3800</d:Freight>
     </m:properties>
  </content>
</demo>

record：与root用法相同。
datafields：表格通过什么字段取值，其中name字段为必须，即localdata或者url中数据的字段名，type，可有可无，可能的值：'string'，'date'，'number'，'bool'；format，可有可无，管道或者过滤器，仅支持时间；map，可有可无，xml的映射路径；

Example with XML data: 
{ name: 'CompanyName', map: 'm\\:properties>d\\:CompanyName' } 
XML
 <content type="application/xml">
    <m:properties>
      <d:CustomerID>ALFKI</d:CustomerID>
      <d:CompanyName>Alfreds Futterkiste</d:CompanyName>
    </m:properties>
  </content>
*** ***
Example with nested JSON data. 
var data = [{ "empName": "test", "age": "67", "department": { "id": "1234", "name": "Sales" }, "author": "ravi"}];
// prepare the data
var source =
{
    datatype: "json",
    datafields: [
        { name: 'empName' },
        { name: 'age' },
        { name: 'id', map: 'department>id' },
        { name: 'name', map: 'department>name' },
        { name: 'author' }
    ],
    localdata: data
};
var dataAdapter = new $.jqx.dataAdapter(source);

注意事项

当使用source 对象时，需要引入jqxdata.js
requires jqxdata.js
但是，当我们用source生成源数据后，还不能直接被jqxGrid使用，需要通过jqx的内置方法转换之后才能使用

var dataAdapter = new $.jqx.dataAdapter(source);