thinking outside the tank

XML Islands in epub publications

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The Open Publication Structure’s Preferrred Vocabulary is a subset of XHTML 1.1 modules. This identifes the groups of tags – <div>, <table>, <p> etc. that all reading systems must be able to render. 

A very high proportion of existing printed matter, including its illustrations, could be converted to epub format using this vocabulary – with formatting and layout support from CSS.

However, XML is a widely used technology and there is a rapidly growing amount of XML content that ebook authors and publishers are sure to want to include. Using open standards means not restricting content to proprietary reading systems, so the problem becomes how to make that content available to all.

The latest Inside Epub article explains how using XML Islands in epub publications extends the power and flexibility of the epub format by specifying how a non-preferred XML vocabulary can be incorporated.

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