is a format developed by the International Digital Publishing Forum. It is characterized by the XML- and XHTM-based optional use of CSS styling. The main feature of this format is the use of reflowable text (word wrap) which makes it possible to adapt the image to different device displays. The ePub file is a zip-archive with an .epub extension.
A file to store presentations with tables, drawings, texts, audio and video created using open source programs: OpenOffice, StarOffice, LibreOffice, etc. The file is editable and based on the XML format. Is an open alternative to the closed PPT format.