: 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.

Int J Gynaecol Obstet (2018) , where page was an " Epub 2018 Oct 10 " regarding FIGO nomenclature. 2. EPUB Technical Development

: Authors often use the Draft2Digital platform to format "draft pieces" into EPUB files for distribution. Summary of Key Uses

: Various studies use this numbering, such as:

The number "393" often appears in academic citations to denote a specific issue or page range of a journal w