Adding a New Repeating Field

To add a new repeating field, you need to create an XML object at the segment's field level. Populate the fields, then link to the message at the repeating field level:

var newDr = new XML ("<PV1.7/>");
newDr ["PV1.7.1"] = "C3333";
newDr ["PV1.7.2"] = "Jones";
msg ['PV1']['PV1.7'] += newDr;