A Hierarchical to Relational transformation requires a hierarchical schema to define the input hierarchy in the transformation. To use the schema in the transformation, you define a schema reference.
You can define transformation schema references in the transformation
References
view.
The Hierarchical to Relational transformation references schema objects in the Model repository. The schema objects can exist in the repository before you create the transformation. You can also import schemas from the transformation
References
view.
A schema can reference additional schemas. The
References
view shows the namespace and prefix for each schema that the Hierarchical to Relational transformation references. When you reference multiple schemas with empty namespaces the transformation is not valid.