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Viewing the Transformation Script

The key component of the mapping implementation is the Transformation Script. The script's role is to produce the final flat wire HL7 message and assign this to the 'value' variable.

To do this, the transformation script will generally create at least one segment iterator object. (In the example shown, this object is called current_segment.) This segment iterator enables the Python code to access the message being transformed, segment by segment. The iterator gives the code the ability to get and change values in each segment and then generate the modified version.

For a description of the segment iterator object, see the Segment Iterator Object manual page.

	The easiest way to understand how this is achieved is to look at the Sample Scripted Transformation VMD from the previous section.

To view the transformation script:

• In the Workspace, expand the LabMessage message definition and double-click Transformation Script. The Transformation Script window appears.

Transformation Script Window

The Transformation Script window displays the Python code that performs the actual transformation.