Iterating Over Repeating Fields

To iterate over repeating fields, check the Handle Repetitions property. First, use the XML object’s length() method to get the number of repetitions to iterate over: var reps = msg ['PV1]['PV1.7'].length();

Then, use a for each loop to iterate over repetitions:

for each (attendingDr in msg['PV1']['PV1.7']) {
      lastName = attendingDr['PV1.7.2'].toString();
}

Note that although JavaScript can be used to iterate through repeating fields, you may find it easier to use the instead.