Block Elements [June 23, 2011, 6:24 p.m.]
There are several primary block elements used in HTML5. We will look at some new and old tags that complement the <head> and <body> duo.
The <header> tag is a container for introductory materials in a document or section. <header> can be used multiple times in a document and usually contains at least one <h1>-<h6> element (in order to validate).