HTML and CSS Reference
The diagram that follows shows the top 20 results in each category
down each side and the corresponding new HTML5 elements along
with the ID s and classes that inspired them in the middle.
Many of the top IDs, like btamarker and nobulletcontent , are
automatically generated by software such as Microsoft
FrontPage and other office products. Their popularity is
therefore more an indication of the market penetration of
the products than author requirements or intentions.