User annotations - bookmarks, highlights, notes, etc... to the best of my knowledge do not stay with the EPUB book but are proprietary to each reader. So if I change readers and open a book that I marked up in another reader my annotations will be lost.
This is not so much of a concern for the immediate future as I don't intend to change readers often, but say in 5 or 10 years I go to re-read a book and I'm using a totally new system/platform/reader - to loose all my annotations from the last time I read it is unacceptable.
- Does the EPUB format support storing user annotations in the book.epub file in a non-destructive manner?
- If it does, are there any readers out there that store all of the user annotations in the book.epub file?