In this example, there is an OBX segment that repeats four times as shown below:

MSH|^~\&|ADV-LABLOG|WML|MEDICALCENTER|NAPOLEAN|200603170742||ORU^R01|14589|P|2.5||
PID|1||102688||JOHNSON^TYLER||19590910|M|||||||||||571344850|
ORC|RE||27828002^COMPREHENSIVE METABOLIC||F|N|||200603011208|||1VANL^GUTIERREZ^NOEL^M.D.|W2||200603011208||
OBR|1||27828002^COMPREHENSIVE METABOLIC|27828002^COMPREHENSIVE METABOLIC|||200603011355|||WML||||200603011208||D84051|||||||||F|
OBX|1|NM|13690101^CALCIUM^L|1|10.0|mg/dL|8.5-10.5|||||||200603011355||
OBX|2|NM|13690102^ALKALINE PHOSPHATASE^L|1|44|IU/L|30-130|||||||200603011355||
OBX|3|NM|13690103^AST/SGOT^L|1|52|U/L|0-48|H||||||200603011355||
OBX|4|NM|13690104^ALT/SGPT^L|1|20|U/L|0-52|||||||200603011355||
OBX|5|NM|13690105^BILIRUBIN, TOTAL^L|1|1.7|mg/dL|0.1-1.4|H||||||200603011355||

The only values you need to map from this message are two fields from each OBX segment:

• Field 5 - Observation Values, and
• Field 6 - Units.

The fields you need to map are shown in the following table:

Instead of mapping each segment to a separate row in a table, you can just map all required values into one row in the table. This will allow you to set the grammar root to Message, meaning only one table is required to get data from non-repeating segments in the message and the repeating OBX segments. To accomplish this, you must increase the Maximum Repeat Mapping Limit.

	Before starting, download this sample VMD file that you can use to perform the steps in this section.

To successfully map the fields you need, you must make the following modifications to the sample VMD file:

• Create a new table and add it to the message's Table Grammar;
• Set the Grammar Root of the new table;
• Increase the default Maximum Repeat Mapping Limit from 2 to 4;
• Increase the number of repeats for the OBX segment; and
• Map the required fields (Fields 5 and 6 for all OBX segments).