HTML and CSS Reference
In-Depth Information
THE HTML5 OUTLINING
SYSTEM
HTML5 defines a set of rules that dictate how you can
create a
document outline
for any web page. A web page's
outline can come in handy in a lot of ways. For example,
a browser could let you jump from one part of an outline
to another. A design tool could let you rearrange sections
by dragging and dropping them in an outline view. A
search engine could use the outline to build a better page
preview, and screen readers could benefit the most of all,
by using outlines to guide users with vision difficulties
through a deeply nested hierarchy of sections and sub-
sections.
