This repository (https://github.com/KhronosGroup/NNEF-Docs) is currently empty, and is used only to file issues about the NNEF Specification.
The NNEF Specification is hosted in the Khronos <a href="https://www.khronos.org/registry/NNEF/"> NNEF Registry, but this is simply a publication mechanism. Actual specification issues should be filed here in NNEF-Docs.