New Tags in HTML5

• <!DOCTYPE>         =  Defines the document type.
• <article>              =  Defines and article.
• <aside>                =  Defines content aside from the page content.
• <header>             = Defines a header for a document or section.
• <hgroup>             = Groups heading( <h1> to <h6> ) elements.
• <section>            = Defines a section in a document.
• <nav>= Defines navigation links.
• <footer>              = Defines a footer for a document or section.
• <audio>               = Defines sound content.
• <video>              = Defines a video or movie.
• <bdi>                 = Isolates a part of text that might be formatted in a different                                           direction from other text outside. 

• <canvas>            = Used to draw graphics, on the fly via scripting (usually                      

                                      Javascript).

• <command>          = Defines a command button that a user can invoke.
• <details>              = Defines additional details that the user can view or hide.
• <summary>           = Defines a visible heading for a <details> element.
• <embed>              = Defines a container for an external (non-HTML) application.
• <figure>               = Specifies self-contained content.
• <figcaption>         = Defines a caption for a <figure> element.
• <keygen>             = Defines a key-pair generator field (for forms).
• <mark>                = Defines marked/highlighted text.
• <meter>              = Defines a scalar measurement within a known range (a gauge).
• <output>             = Defines the result of calculation.
• <progress>          = Represents the progress of a tast.
• <rp>                   = Defines what to show in browsers that do not support ruby annotations.
• <rt>                 = Defines an explanation/pronunciation of characters ( for East Asian      typography).
• <ruby>             = Defines a ruby annotation (for East Asian typography).
• <source>          = Defines multiple media resources for media elements (<video> and <audio> ).
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• <time>            = Defines a date/time.
• <track>           =Defines text tracks for media elements ( <video> & <audio> ).