After introducing the data-frame layout, now switch to another general used struct: Object struct. The Object struct defines the input data and all related info of each parsed data, which is represented as follows:
As can be seen from the struct, the valid data bits, field id, data type and flags are all provided for each data. Data-frame APIs achieve read and write the data-frame format data to/from the data streams that packed as an Object struct. For instance, the CSV/JSON parser results are structed as an Object struct stream.