Developing a Page Independently of a Task Flow
To make a page (or page fragment) reusable in different task flows, it should be independent of the task flow. The page flow–scoped parameters that are used on the page may not be named the same as the task flow’s page flow–scoped variables. So pages that are developed independently and used in different task flows need another mechanism to be able to use the values that are stored in page flow–scoped variables for a particular task flow.