The META-INF directory of the EPUB book.
The container.xml file. It is used to locate the OPF file in the EPUB book.
OptionalmimetypeThe mimetype of the EPUB book.
The OEBPS directory of the EPUB book.
The content.opf file. It contains the metadata and manifest of the EPUB book.
The nav.xhtml file. It contains the navigation of the EPUB book. This file is included for compatibility with EPUB 3.
The toc.ncx file. It contains the table of contents of the EPUB book. This file is included for compatibility with EPUB 2.
The structure of an EPUB book.