Pro HTML5 Programming

Pro HTML5 Programming
Powerful APIs for Richer Internet
专业的HTML5 程序设计手册。想用学习php5的朋友要注意了。 

We’ll say more about some of these later.

To achieve all this simplicity, the specification has become much bigger, because it needs to be
much more precise—far more precise, in fact, than any previous version of the HTML specification. It
specifies a legion of well-defined behaviors in an effort to achieve true browser interoperability by 2022.
Vagueness simply will not make that happen.
The HTML5 specification is also more detailed than previous ones to prevent misinterpretation. It
aims to define things thoroughly, especially web applications. Small wonder, then, that the specification
is over 900 pages long!
HTML5 is also designed to handle errors well, with a variety of improved and ambitious error-
handling plans. Quite practically, it prefers graceful error recovery to hard failure, again giving A-1 top
priority to the interest of the end user. For example, errors in documents will not result in catastrophic
failures in which pages do not display. Instead, error recovery is precisely defined so browsers can
display “broken” markup in a standard way.