Laurie Jarlstrom of Intel announced the latest UEFI FDF spec: V1.27 Draft for Review.
“Please Review By EOW”.
I think I already saw an issue show up on the public EDK2 bug database.
EDK II FDF File Spec v1.27 DRAFT for Review
Update Sept 2016 (DRAFT)
This document describes the EDK II Flash Description (FDF) file format. This format was designed to support new build requirements of building EDK and EDK II modules within the EDK II build infrastructure. The EDK II Build Infrastructure supports generation of current Unified EFI, Inc. (UEFI 2.6 and PI 1.4) compliant binary images. The FDF file is used to describe the content and layout of binary images. Binary images described in this file may be any combination of boot images, capsule images or PCI Options ROMs.