Table 1: Definition of composite operations by suboperations.

Composite operation Sequence of suboperations

MoveField(, ) ,
= AddField(, ),
= DeleteField()

PullUpField(, ),
.children =
,
= MoveField(, ),
= DeleteField(),

PushDownField(, ),
.children =
,
= MoveField(, ),
= AddField(, ),