You can use tabs to categorize the information on your desktop. A tab is a web page. Each top level tab can have multiple nested tabs. The Enterprise Sample uses two tabs: Home and My Portal. The Home page has the nested tabs News and Career.
Every page is either one of the following:
The framework that displays tabs. It can hold nested tabs.
The framework that displays the rows and columns for a particular tab.
Before you can display the information within a channel, a tab and table container must be defined.
The Adventure Sports Cafe home page is a tab, and the News tab is nested within. A tab may specify a set of providers and/or portlets that it may contain. The home page consists of a type of table container which has a three column layout (thin, wide, thin).