The global layout is a top level component that would usually live high up in the component hierarchy and provides the general navigational structure. It includes a top navigation bar, sidebar and area navigation as well as a content area for page layouts and encapsulates these components for consistent usage.
Top Navigation
The top nav bar sits at the top of the layout and provides access to common actions such as notifications and help. It supports dropdowns and search fields.
Side Navigation bar
The side navigation bar provides the first level of navigation and can include additional links to the bottom for areas such as configuration or user profile which play more of an auxiliary role.
Area Navigation
Provides a second level of navigation for a particular area chosen as part of the side navigation bar.