FB2 or FictionBook is an XML based ebook format. FB2 is different than other eBook format as it uses only one XML file. The embedded images with eBook are also increased. It contains both metadata and plain texts at beginning. It places image at the end of the file. eBOOK readers render before opening any FB2 file.
EPUB is an electronic document viewer format that can display digital. EPUB uses an open format that uses XML format. Several eBook readers support EPUB files. In this format there different open standards are used. It can define content markup, structure and compress the content as ebook format.
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