Accepting wanted segments instead of deleting the unwanted ones.

[bob.nwl]

Currently my transformer deletes a list of unwanted segments.
delete msg['ZIR'];
delete msg['ZEN'];
delete msg['ZSP'];
Is there a way to keep only the segments that I need without using the static delete so that changes in the source message such as adding another z or IN segment do not affect the channel?

Something along the lines of:

If segment is not MSH, PID PV1 then delete segment.

[cory_cole]

for each (seg in msg)
{
segName = seg.name().toString();
if(segName != 'PID' && segName != 'MSH' && segName != 'PV1')
{
delete seg;
}
}

[Bostad]

If you have a large set of segments you want to keep you could do this:

var strGoodSeg = 'MSH~PID~PV1~NK1~OBR'  //you get the point right?


for each (seg in msg.children()) {

   var strCurSeg = seg.name();

   if (strGoodSeg.indexOf(strCurSeg) < 0) {     //okay to delete

         delete seg;
 }

}