Changes in HTML 5 - <article> Tag
What's new in HTML 5
The <article> tag is one of the new elements in HTML 5. It is one of the new sectioning tags in HTML 5, which are intended to reduce the need to use <div> tags for sectioning purposes.
Differences between HTML 5 and earlier versions of HTML
The <article> tag did not exist in older versions of HTML.
The 2000-2010 Recommendations from the W3C HTML Working Group defined the HTML namespace for the names of all HTML element types, which now includes the article element name. In older versions of HTML, element type names were not associated with a namespace.