| http://www.w3.org/ns/prov#value | - IDPF Standards are non-proprietary open standards???meaning anyone can apply or use them at NO COST. Epub specifications are based on open standards such as XML, XHTML, CSS, DTBook, OASIS, Open Document Format and others. (Unicode,) EPUB is an XML-based file format designed to reflow text according to screen size We are all familiar with PDF which is an example of a non-reflowable book.
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