Effects of OpenGL XML specification's license on generated bindings

Hello! I’m currently working on generator of OpenGL bindings for Vala, a programming language that transpiles to C. I’d like a clarification on what restrictions does Apache license of OpenGL XML specification I use as a generator input place on the resulting files.

Do generated files have to be licensed under the terms of Apache license as well? Do I have to include a comment mentioning that they were generated from official OpenGL XML spec? Is there anything else to be aware of here?