This tutorial describes how to use Iguana channels to convert data into HL7 Version 3 CDA documents. In this tutorial, you will:

• Use Chameleon to create a VMD file that extracts data from an incoming message and transforms it into XML format;
• Create a second VMD file that uses a Python script to generate an HL7 Version 3 CDA document from the XML data;
• Create channels in Iguana to receive incoming HL7 message data in any version 2 format, convert it to XML, then generate the HL7 Version 3 CDA document.

	Note that this example is not an HL7 Version 3 processing engine: it only generates specific output text. If you are familiar with HL7 Version 3, you can adapt this example to generate the information that you require.

	This tutorial describes how to generate HL7 Version 3 CDA documents, not HL7 Version 3 messages. For a tutorial on how to generate HL7 Version 3 messages, see Generating HL7 Version 3 Messages.