Use this parameter only when paginating results and only after you receive a response indicating that the results are truncated. Set it to the value of the Marker element in the response that you received to indicate where the next call should start.
Use this only when paginating results to indicate the maximum number of items you want in the response. If additional items exist beyond the maximum you specify, the IsTruncated response element is true.
The key that is used to sort the results. If you choose the namespace key, the results are returned in alphabetical order. If you choose the time key, the results are sorted numerically by the date and time.