Html/New HTML5 Elements

From W3C Wiki

Elements introduced in HTML5

There has been a few elements introduced in HTML5. Some of them were imported from XHTML2, others from large statistical surveys on made by Google, Opera and other people. The analysis of class names and id names helped defining what were the most common semantic patterns. These new elements are not yet completely imported in all browsers at this time.

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Note also that the input element has been extended with several new types as well.