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Step 2 - Creating the VMD File |
Once you have created a form for your application, the next step is to define the VMD file that the application will use to parse ADT^A04 messages. To do this, you must use Chameleon to create a VMD file that contains this message information.
To create the VMD file:
- Start Chameleon.
- Select Options from the toolbar, click the Misc tab, and select the Use .NET properties when generating .NET code check box. If this check box is not selected, your VB.NET application may not work properly.
- Use this sample message to import the ADT^A04 message and its segments from the Chameleon library. The message definition you create should be named PatientRegister.
- Create a segment grammar consisting of the MSH and PID segments.
- Create a table named Patient, and define fields for it named PatientID, Surname, FirstName and SocialSecurityNumber. All of these fields are of type String.
- Add the table to the Table Grammar, and specify Message as the grammar root.
- Finally, use the following mappings to map fields in the table to fields in the PID segment:
| PatientTable field | Field in PID Segment |
|---|---|
| PatientID | Expand field 3, and use its first subfield (1 - ID Number) |
| Surname | Expand field 5 and subfield 1, and use its first subsubfield (1 - Surname) |
| FirstName | Expand field 5, and use its second subfield (2 - Given Name) |
| SocialSecurityNumber | Use field 19 (19 - Ssn Number - Patient) |
When you have completed these steps, save the VMD file and remember its location. You will need to supply this location to your application so that it can parse messages.
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A copy of the VMD file for this tutorial is located in vbnet_server.vmd. For more details on how to create a VMD file for parsing HL7 messages, see HL7 to Application. | ||
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Once you have created the VMD file, the next step is to use this file to create stubcode for your application.