Introduction
The fifth edition of this book represents a significant change in structure and content to address HTML5. The book is similar to the previous edition in maybe a third of the content; otherwise, it is an all-new effort. Most obviously, as compared to the previous editions, which focused mainly on XHTML and HTML 4, this edition focuses on HTML5, which represents both a return to the markup past and the unveiling of an exciting future of Web applications. However, we do retain some information from previous editions because in order for this work to be truly complete, we must not focus only on the future but also present all the elements supported in browsers today, including the archaic, proprietary, and standard (X)HTML tags. These ...
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