This Application Model includes elements that define the scope of an application, its startup and shutdown behavior, and how it manages windows and resources; provide basic navigation functionality, journaling and journal extensibility, browser integration, and Structured Navigation; and define the way an application is deployed, installed, activated, updated, rolled back, and removed from the system in a secure, non-impactful way. It also enables using the same tools and languages for Web applications and locally installed applications, and allows the same application to be hosted in the browser or in a standalone window, based on a compile-time attribute.