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ePUB is a globally accepted format that is supported by most e-book readers. EPUB and Amazon's proprietary Kindle (.Mobi) have revolutionized the e-book development industry and have fuelled rapid e-book growth worldwide.
The first step in e-book development in the EPUB (.epub) format is to evaluate the available content and understand whether it requires further editing, formatting or OCR (Optical Character Recognition). All such requirements have to be determined before the actual coding/ conversion in the development process.
Usually the book development process for EPUB and various e-book formats requires the creation of a valid XHTML file along with a suitable CSS (Cascading Style Sheet). This is the backbone of e-book coding. The XML files contain all the information, such as the location of the content in the EPUB e-book and the action required. After completion, the coded file is subjected to the validation and optimization process, which is done in accordance with the IDPF (International Digital Publishing Forum) standards. This involves the creation of an OPF manifest file, compilation of the metadata, creation of a dynamic ToC (Table of Contents) file, and finally consolidation of everything into a single valid ".epub" file, also called the "container" file.
The "container" file contains at the very least, the following folders and files:
This is a simple ASCII text file containing the line "application/epub+zip". It provides the e-book reader/ operating system with information about everything in the .epub. This file should precede all files in the .zip file; it cannot be compressed.
It holds the "container.xml" file, which points to the position of the book within the Content.opf file. This folder is uniform for every book.
This is the ideal location for all the book content. It includes the:
Images folder: It contains all the images included in the book.
Content.opf: An XML file that has a list of the contents of the .zip file in a chronological sequence and includes:
The final EPUB development step puts the e-book in a readable format as follows:
The validated file is then subjected to quality assurance checks. The optimization process includes testing the file on popular e-book readers such as the Kindle, iPad, Nook and other devices, and tweaking it further, as necessary, to ensure that the e-book functions properly. Now the e-book is packaged and ready for publishing on different platforms.
Our skilled and experienced EPUB development experts can convert books from any format like printed books, text, MS Word, PDF, html and more into the EPUB format.
Contact us today to discuss your e-book development requirements.