By using Pyrocat HD as a divided developer which expands the tonal range way outside what is typically possible with a standard developer is this not a HDR (High Dynamic Range) technique for film?

Typically HDR has become associated with extremely distorted digital images giving an unrealistic view of a standard subject.

The image below was a HDR image consisting of 5 digital images to control detail in both the light & dark parts of the image.

Wells Catherdral Interior HDR by Ed Bray, on Flickr

The image below was on 5x7 Foma 400 film developed in Divided Pyrocat HD to maintain detail both inside and outside of the building.

Window, Old Filter House, Tottiford by Ed Bray, on Flickr