As its name implies this tie beam to plate tying joint, unites a tie beam, plates, rafter and posts all in a compact structurally sound way. It utilizes a spline to tie the plates together and traditional mortise and tenon joinery to complete the rest of the joinery.
I like this joint because it allows the tie beam to sit higher than the plate beams; I need maximum height clearance at the gable ends for my structure. Is there a link that shows how the corner posts would be joined with the corresponding tie beam and plate beam?
Not in how that assembly is done. It would basically be the exact same, except you would need a different joint for the plate-to-corner connection. You could use a spline there as well.
https://timberframehq.com/timber-frame-corner-joint-with-spline-and-a-tenon
The tie beam would still sit on top.