Links also can be made automatically. An automatic link occurs when the user performs an action that selects a window in which a link is defined. For automatic links to occur, the reftype= attribute of the :link. tag must have a value of hd, inform, or launch. Automatic links allow you to:

• Display multiple windows when a heading or link definition is selected (hd attribute).

• Display multiple secondary windows within the coverpage of a primary window (hd attribute).

• Send a message to the application when a window is displayed (inform attribute).

• Start a Presentation Manager program when a window is displayed (launch attribute).

Automatic links can be associated with selectable links so that another action occurs in addition to the display of a linked window. For example, a Presentation Manager program can be started, or a message can be sent to the application program.

Restriction: Linking automatically to an external database is not possible.