Add Second Source
The next step is to add the second source file: Insert Library.xml into the mapping. Since the schema (Library.xsd) is referenced in this XML file, you do not need to add the schema file in a separate step. To check whether the schema reference is correct, open the Component Settings.
Then press and hold the header of the new component and place it under the Books component. You can always move components in any direction. Nevertheless, placing a source component to the left of a target component will make your mapping easier to read and understand. This is also the convention for all the mappings illustrated in this documentation and the sample mapping files accompanying your MapForce installation.
At this stage, the mapping design looks as follows: