json format for DataTables

Hi:
deal all, I have a problem about the json format for DataTable.
The following is the txt which the DataTables needed:

{
    "data": [
        {
            "name": "Tiger Nixon",
            "position": "System Architect",
            "salary": "$320,800",
            "start_date": "2011\/04\/25",
            "office": "Edinburgh",
            "extn": "5421"
        },
        {
            "name": "Garrett Winters",
            "position": "Accountant",
            "salary": "$170,750",
            "start_date": "2011\/07\/25",
            "office": "Tokyo",
            "extn": "8422"
        }
    ]
}

And the code snippet is as below:

 $('#example').DataTable({
                "ajax": "simple.txt",
                "columns": [
                    { "data": "name" },
                    { "data": "position" },
                    { "data": "office" },
                    { "data": "extn" },
                    { "data": "start_date" },
                    { "data": "salary" }
                ]
            });

And the result is I need to add the '{"data:"' and ' }" to my json data each time,
why not just use the txt without the data tag, like following:

[
        {
            "name": "Tiger Nixon",
            "position": "System Architect",
            "salary": "$320,800",
            "start_date": "2011\/04\/25",
            "office": "Edinburgh",
            "extn": "5421"
        },
        {
            "name": "Garrett Winters",
            "position": "Accountant",
            "salary": "$170,750",
            "start_date": "2011\/07\/25",
            "office": "Tokyo",
            "extn": "8422"
        }
]

Is that possible to do that? Thanks a lot.