Pages, Objects and Links
The web is greatly inspired by books. Similar to a book, the most fundamental part of the web is a "page". When user clicks a link on the page, he expect to find himself on a different page. When "Back" button is clicked, user returns to the previous page.
Each page may contain a number of dynamic elements, which on their own may have a state and dynamic interaction with the user. Such elements are always described on the same page and must not communicate with other pages.
Agile Toolkit automatically decides which page needs to be loaded. Each page is represented as a class and will be loaded from a file such as page/index.php. You as developer can add other objects on the page. Designer can change the template of the page creating custom layouts and adding static text where necessary.