The bookend object stores properties that identify optional subforms that bookend the contents of the parent subform.
The leader property identifies an optional subform or subformSet that is laid out first, before the contents of the parent container. The trailer property identifies an optional subform or subformSet object that is laid out last, after the contents of the parent container. In this way, these properties bookend the contents of the parent container. This is true regardless of how many contentArea or pageArea objects the parent container spans.
Form Model
node class
Read /Write
Read /Write
Read /Write
Read /Write

bookend