The Site Layout Model
The Site Layout Model is the organization of the presentation layer and navigation of your site. Containers, pages, sections, and the site are all components of the Site Layout Model. Each of these components can be secured individually as a layer above Site Object Model security. Each element can also be cached individually, allowing you to cache sections within a page to improve performance without sacrificing interactivity.
The Site Object Model is constructed by site designers and can be managed by business users. The burden of site maintenance now becomes the power of site control by giving the tools to manage the site directly to those who need them.