New Elements in HTML 5 -ShYaM..

The following HTML 5 elements have been introduced for better structure:

• section represents a generic document or application section. It can be used together with the h1, h2, h3, h4, h5, and h6 elements to indicate the document structure.
• article represents an independent piece of content of a document, such as a blog entry or newspaper article.
• aside represents a piece of content that is only slightly related to the rest of the page.
• hgroup represents the header of a section.
• header represents a group of introductory or navigational aids.
• footer represents a footer for a section and can contain information about the author, copyright information, et cetera.
• nav represents a section of the document intended for navigation.
  
  
• figure represents a piece of self-contained flow content, typically referenced as a single unit from the main flow of the document.
  

  
   
   
  Example

  figcaption can be used as caption (it is optional).

Then there are several other new elements:

• video and audio for multimedia content. Both provide an API so application authors can script their own user interface, but there is also a way to trigger a user interface provided by the user agent. source elements are used together with these elements if there are multiple streams available of different types.
• embed is used for plugin content.
• mark represents represents a run of text in one document marked or highlighted for reference purposes, due to its relevance in another context.
• progress represents a completion of a task, such as downloading or when performing a series of expensive operations.
• meter represents a measurement, such as disk usage.
• time represents a date and/or time.
• ruby, rt and rp allow for marking up ruby annotations.
• wbr represents a line break opportunity.
• canvas is used for rendering dynamic bitmap graphics on the fly, such as graphs or games.
• command represents a command the user can invoke.
• details represents additional information or controls which the user can obtain on demand. The summary element provides its summary, legend, or caption.
• datalist together with the a new list attribute for input can be used to make comboboxes:
  

• keygen represents control for key pair generation.
• output represents some type of output, such as from a calculation done through scripting.

The input element's type attribute now has the following new values:

• tel
• search
• url
• email
• datetime
• date
• month
• week
• time
• datetime-local
• number
• range
• color

The idea of these new types is that the user agent can provide the user interface, such as a calendar date picker or integration with the user's address book, and submit a defined format to the server. It gives the user a better experience as his input is checked before sending it to the server meaning there is less time to wait for feedback.
Source : http://www.w3.org/