A demonstration document of the different landmark roles, and some high level information about each.
A companion blog post to this landmark demo can be found on my website: Accessible Landmarks.
The post covers the different landmarks, how to access them with different screen readers, as well as other related information.
This demonstration was written by Scott O'Hara.
It has an MIT license.
Use it to learn, use it as a template to build your own documents, do whatever you like with it. :)