Visibility Rules for the Link Object Type
After you drill down to another screen, the thread bar is updated. The current view displays its records using a master-detail relationship, based on the value of the link property Visibility Rule Applied in the original view (before the drilldown).
If Visibility Rule Applied is set to Never, then no additional visibility rules apply. The thread context’s master-detail relationship determines the records visible in the view, regardless of the visibility setting for the current view. If you change the view using the link bar, then the thread context is retained. Records might be displayed that normally (without the thread context) are not visible in this new view.
If Visibility Rule Applied is set to Always, then additional visibility rules apply. The Siebel application might display an error message when a user performs a drilldown to notify the user that he or she does have the appropriate privileges to see the detail records. For more information about the Link object type, see Siebel Object Types Reference.