I'm actually working on an org-mode onenote sync tool right now and the files are stored in an xml format of some kind. With very little knowldge of the forma

I'm actually working on an org-mode onenote sync tool right now and the files are stored in an xml format of some kind. With very little knowldge of the format I was easily able to parse out all todo lists from the blob (which is a zip file btw).