Web “sites” are complete abstractions—they don’t exist, except in our heads. When we identify a site as such, what we’re really describing is a collection of individual linked pages that share a common graphic and navigational look and feel. What creates the illusion of continuity across a cohesive “site” is the design features that pages share. Individual html pages and how they are designed and linked are the atomic unit of web sites, and everything that characterizes site structure must appear in the page templates.