The KTX registry contains specifications of the core file format and registered Khronos- and vendor-approved extensions adding supercompression schemes and metadata keys. Vendors are strongly encouraged to register schemes and keys to avoid conflicts. Registration is done through the KTX Registry backing store repo on GitHub.
There is currently no header file or other canonical machine readable description for either KTX v1 or v2.
Implementers of readers and writers may find the following useful:
The current version of KTX is KTX v2.0.