[thaumasiotes]

> It may be too late for sqlite, but if I were designing an API that had to remain stable for decades now, I would put an enum with possible versions in a header and require the user to pick one.

I read an essay about XML once where the author noted that he got a warm feeling inside whenever he saw the opening tag:

    <?xml version="1.0">

He noted that there were no higher versions. (Though they're now up to 1.1.) But he considered that the inclusion of a version number from the beginning of the standard was a shining example of why they hadn't needed a new version.