html 5

HTML 5 will be the new addition of HTML. HTML 5 contains many pros and cons. over here i am discussing few of them. HTML 5 have its Geolocation API so we can know geographical position of a user. It supports mobile devices. It improves accessibility and consistency. It also fulfill need of web application. The only disadvantage of HTML 5 is that it support only modern browser.

There are a lot of articles about HTML 5 and CSS3, I found one article http://www.typesett.com/2010/03/html5-an-introduction-from-a-designers-perspective/ which can give you a very clear explanation of the HTML 5 structure.