EPUB and RTF explained
EPUB is essentially a website in a box — a ZIP of XHTML and CSS. Because the content is reflowable, the reader chooses the font size and the text re-wraps, rather than being locked to a page.
RTF is a plain-text markup format for styled documents. Opening one in a text editor shows readable markup, which makes it unusually durable — but it supports only basic formatting.
- Where EPUB files come from
- E-book stores, library lending and self-publishing.
- Where RTF is used
- Cross-application document exchange, especially from older software.