The next step is to specify the grammar root and the table mappings for the two tables that you have just added to the table grammar.

To set up the grammar root and mappings for the Patient table:

• In the Table Grammar panel of the Message Grammar window, select the Patient table.
• Click the ellipsis button under Grammar Root. The Grammar Root Selection window appears.
• Select Message as the grammar root, and click OK.
• Click Edit Mappings. The Table Mappings for the Patient table are already mapped:

PatientTable Already Mapped

To set the grammar root for the PatientObservation table:

• In the Table Grammar panel of the Message Grammar window, select the PatientObservation table.
• Click the ellipsis button under Grammar Root. The Grammar Root Selection window appears.
• Select the OBR segment as the grammar root. You must select this segment, not the entire message, because the segment is repeated. Each segment will map to a separate row of the PatientObservation table.
• Click Edit Mappings.

Next, define the mappings for the PatientObservation table:

• In the right pane of the Table Mapping window, expand field 4 (Universal Service Identifier).
• Drag the 1 - Identifier field to the ID row of the table.
• Drag the 7 - Observation Date/Time # field to the Time row of the table.
• Expand field 16 (Ordering Provider), and drag 1 - ID Number to the OrderingProvider row of the table.

When you have finished the mappings, the PatientObservation table looks like this:

Mapping the PatientObservation Table

Note that the PID field is unmapped. This field will contain the patient ID, which is contained in the PID segment. In the next section, you will see how to use Python to copy this patient ID from the PID segment to this field.