OpenCL developer guide for Intel GPUs

[RocketRide9]

Hi. I couldn't create a discussion, so I hope it's fine that I will leave my question here.
Developer guide here: link is outdated and doesn't cover usecases with Intel discrete GPU. The main problem I have is efficiently managing buffers on iGPU systems and GPU systems with the same codebase.
Is there updated guide for Arc GPU? I found one for OneAPI, but that seems specific to SYCL.