Re: this previous post:

https://firmwaresecurity.com/2016/07/26/guidance-on-using-acpi-_dsd-with-linux/

Al Stone of Red Hat published an updated version of 3 documents giving guidance on using _DSD ACPI:

[RFC DSD v3 00/04] How to Use the ACPI _DSD Device Properties UUIDs

A copy of the ChangeLog is also attached so that you can see what the primary changes were for this second version.

https://github.com/ahs3/dsd/tree/master/documentation

https://github.com/ahs3/dsd/commit/7fbdce494b9b7b952e709e43b8dbbfd5cf8d4fcb
https://github.com/ahs3/dsd/commits/master
http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf
http://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-data-extension-UUID-v1.pdf