In previous releases, if the pages within an application were public and did not require authentication, you could assist users in bookmarking pages by using zero as the session ID. Although this approach is still supported, Oracle Application Express, release 5.0 includes a new feature called Rejoin Sessions that enables you to control this type of support at the page, application, or instance-level. To learn more, see "About Rejoin Sessions."
See Also:
"Facilitating Bookmarks by Using Zero as the Session ID" in Oracle Application Express Application Builder User's Guide, release 4.2