Web Annotations would in theory work better for epubs than they do for pdfs.
Making web annotations in PDFs is either coordinate based (page + rectangles) or text bases (quoted text). The quoted text in PDFs is error-prone because PDF is a layout format. Text quotations are more precise in epubs.
The base url for such annotations should be content-addressable storage, i.e. a hash instead of a plain url.
Making web annotations in PDFs is either coordinate based (page + rectangles) or text bases (quoted text). The quoted text in PDFs is error-prone because PDF is a layout format. Text quotations are more precise in epubs.
The base url for such annotations should be content-addressable storage, i.e. a hash instead of a plain url.