: The W3C and IDPF frequently release "Public Working Drafts" for the EPUB standard. A specific internal draft or issue number "393" may refer to a particular tracked change or modular component within these specifications.
: Various studies use this numbering, such as: 393 epub
: Authors often use the Draft2Digital platform to format "draft pieces" into EPUB files for distribution. Summary of Key Uses : The W3C and IDPF frequently release "Public