{
  "fields": [{"id":"_id","type":"int"},{"id":"column_name","type":"text"},{"id":"column_type","type":"text"},{"id":"dsescription","type":"text"}],
  "records": [
    [1,"_id\t","Number","ลำดับรายการ"],
    [2,"year","String","ปีงบประมาณ"],
    [3,"highway_name\t","String","ชื่อทางพิเศษ"],
    [4,"car_type","String","ประเภทรถ"],
    [5,"traffic","Long","ปริมาณจราจร (คัน)"]
]}