Hi Vicky, there are no documentation or tutorial for the PathPoints and PathCurve animgraph samples as I am awared. I just basically setup from scratch everything in the sample, but in the full_warehouse.
There is a document tutorial at AnimGraph Example Workflow — Omniverse Extensions
But this just shows how to use the Blend node only, it does not show how to setup others nodes.
To sum up, I follow no documents or tutorial, I just replicated 100% from the sample