Message type field

This path specifies the Message Type field (ID 00013) in the MSH segment:

0(0).MSH(0).00013

Dots (.) separate path items. Individual items are:

  • 0(0)

    The first instance of the first segment group.

  • MSH(0)

    The first instance of the MSH segment in the group.

  • 00013

    Field number 00013. This number does not have a repetition count. If the last item in an HL7 object path does not have an explicit instance count specified, then (0) is assumed.

For example, in the ADT_A17 message definition:

MSH
EVN
{
     PID
     PV1
}      

The first two segments, MSH and EVN, are required and display exactly once.

The next pair of segments, PID and PV1, must display at least once, but more instances of the pair are permitted.

The PID-PV1 pair is the second group in the message.

MSH          0(0).MSH
EVN          0(0).EVN
{
     PID       1(0).PID
     PV1      1(0).PV1
}     

Two or more segments can be present in a repeating group, marked by curly braces, or in an optional group, marked by square brackets. In these cases, they must have a separate group number.

All the items within a pair of curly braces or square brackets are in the same group number.

The PID-PV1 pair is the second group in the message: 1(0).