Critical editions can be complex objects to digitise both in the output/publication process and in the production. In most cases, for the output, there is the need to manage facsimiles, a main text (with lots of diacritics, deletions, suppressions, supplied text), an apparatus (with a very dense, conventional notation), footnotes (with cross references and bibliographic references), and conventional markings for page breaks from previous editions and/or manuscripts, in the form of other digitised text or images.