Navigation Mesh Reference

I’m wondering if the old reference for Navigation Mesh from UDK is still accurate for UE4.

http://udn.epicgames.com/Three/NavigationMeshReference.html

This reference is real good and explains it nicely, and from what I can find I don’t see why this information would have changed for UE4.

Is this reference still applicable to UE4?
If not, what changed?

Conny Landstedt

Navigation system in UE4 has been written from scratch to support fully dynamic worlds and rapid development. There’s nothing really in common between UE4’s and UDK’s navmesh except for high level idea of navigable mesh. Unfortunately there’s no real documentation just yet, but there has already been a lot of information posted here and on forums.unrealengine.com.

–mieszko