This video shows a first demo of freely licensed (GNU AGPL 3 or later) conversion software, which automatically produces e-book (EPUB) and print (PDF) formats from semantic input files (in this case ODT, which is an OpenOffice/LibreOffice document, based upon an OTT, which is a document template).

Source code (native): https://github.com/skreutzer/automated_digital_publishing
Source code (server): https://github.com/skreutzer/automated_digital_publishing_server
Project overview: http://www.skreutzer.de/digitales_publizieren/index.html