C.11. Required Extension Tokens

In addition to any tokens specific to the functionality of an extension, all extensions must define two additional tokens.

For example, for the WSI extension VK_KHR_surface, at the time of writing the following definitions were in effect:

#define VK_KHR_SURFACE_SPEC_VERSION 24
#define VK_KHR_SURFACE_EXTENSION_NAME "VK_KHR_surface"