Sybase PowerDesigner XML User Manual page 254

Generating a DAD file for IBM DB2
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In the case of an existing XML model, the generated elements appear
next to the existing elements.
Extended model definitions
The SQL/XML extended model definition is automatically attached
to the generated XML model.
You can attach the XML Document extended model definition to
generate a simplified XML file that will help you understand the
annotated schema. (See Note in step 11)
9 Select Model Extended Model Definitions.
The List of Extended Model Definitions appears.
10 Click the Import an Extended Model Definition tool.
The Extended Model Definition Selection dialog box appears.
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