FlightXML3 documentation and ETA

Hey,
I currently have access to the XML2 where is the documentation for XML3. I need to find flights and their estimated arrival times. I would like to know how similar the process for this is.
Thanks

Information on FlightXML3, including signup and call documentation, can be found here:
https://flightaware.com/commercial/flightxml/v3/content.rvt