The CopyBag statement requires an operator, “from bag” name and “to bag” name, in the format

AddBag <operator> <from bag> <to bag>

• <type> may be either 'overwrite', 'add', 'subtract'
• If <type> is 'overwrite', then the 'from bag' is copied exactly to the 'to bag'
• If <type> is 'add', then entries in the 'from bag' are added to the 'to bag' if they aren't already there
• If <type> is 'subtract', then entries in the 'from bag' are removed from the 'to bag' if they are there

CopyBag overwrite mybag mynewbag

CopyBag overwrite mybag1 mynewbag
CopyBag add mybag2 mynewbag