Would it be possible to offer a doxygen tagfile for referencing SDK groups/files in a project documentation?
openCV has this: docs.opencv.org/.../tutorial_cross_referencing.html
Unfortunately the html-parsing feature was dropped from doxygen (stackoverflow.com/.../8658114), so referencing is now only possible with a tagfile as far as I know.
I think this wouldn't be such a problem and maybe you're already generating a tag file for the SDK documentation.