The occur object describes the constraints over the number of allowable instances for its enclosing container.
Modify the occur object on the template:ready event. However, the template:ready event is not accessible in the user interface. You cannot modify the occur object at the form:ready event, because this event occurs too late in the form processing.
Form Model
extras
script (occur.script is reserved for future use)
node class
Read /Write
Read /Write
Read /Write
Read /Write

occur