The sitemap is a model of how this site is constructed. Each section (home, information, this site and interactive) has it's own column. There are also some symbols used in the sitemap and in the navigation bar (left). The sections are marked with a 
, the main subjects in the section with a 
, the parts of a main subject with a 
, and some times you'll see these: 
. These are parts of the page. They're only used when a part of a main subject is divided in other parts.
