Unsupported elements in HTML5

The following items are no longer supported in HTML5: <acronym>, <applet> <basefont>, <big>, <center>, <dir>, <font>, <frame>, <frameset>, <noframes>, <S>, <strike>, <tt>, <u> and <xmp>

new tags

Major new tags in HTML5, just looking to add a semantic meaning than what was previously meant a div or span.

These tags can be used in conjunction with standard labels HTML4.

<header> and <footer>
<header> Elements and replace <footer> <div id="header"> and <div id="footer"> and usually contain the section of the header and footer of the design, but also can be used as header and / or footer of a special section. These tags can be used multiple times in a single design.

<hgroup>
This element is used to group multiple header tags (<h1> <h2> <h3> <h4> <h5> <h6>) when they go to use titles, subtitles, etc to avoid cutting the flow of the document outline.

<nav>
This tag is designed for you to put navigation menus either the home page or to a particular item.

<section>
This label indicates a generic section of the site: The label <section> is a thematic grouping of content, typically with a header.

<article>
This label represents a section of independent content. This label is used for answers in a forum, articles on a blog or an article comments.

<aside>