Draw scheme for algorithm

Question

What program is modeled in this diagram?

Answer 1

According to Pylon's documentation, that's

The Pyramid traversal algorithm. We’ll provide a description of the algorithm, a diagram of how the algorithm works, and some example traversal scenarios that might help you understand how the algorithm operates against a specific resource tree

In the above link there's a clear description of the algorithm, and here it is the implementation, in Python.