The INSERT ELEMENT command places one or more elements or groups
    into one or more groups. The groups must already exist. When you
    use the INSERT ELEMENT command with a group name, you insert the
    contents of the group. For example, if you insert group A into
    group B by using the INSERT ELEMENT command, group B will contain
    the contents of group A at the time of the insertion transaction.
    If the contents of group A change at a later time, the contents of
    group B are not affected. To insert a group into another group,
    use the INSERT GROUP command.