fb2
What is a .fb2 file?
application/x-fictionbook+xml
FB2 (FictionBook) is an XML-based e-book format that stores an entire book, including metadata and embedded images, in a single well-structured XML file. It emphasizes semantic markup of book structure over fixed presentation. It is especially popular in the Russian-speaking e-book community.
How to use a .fb2 file
Use an example FB2 to test XML e-book parsing, embedded-image extraction, metadata handling, and converters between FB2 and EPUB.