...
- the management of the ADL sequencing object,
- the ActivityTree SeqActivity (and persistence thereof)
- such that the SeqActivity object (defined in org.adl packages) need not be known to the user (tool)
- SeqActivityTree (and persistence thereof)
- such that the SeqActivityTree object (defined in org.adl packages) need not be known to the user (tool)
- navigation control informational methods (booleans informing view renderers: isNext())...