In most cases, the XSLT that is generated by SAP Mobile WorkSpace is sufficient. However, in some cases, you may need to modify the generated XSLT file, or to create a new one manually.
For example, the schema indicated that an integer field is not nullable, but the Web service response message failed to return a valid integer value. This omission triggers an error on the device application. even though the root issue is the data from the Web service, not SAP Mobile Platform.
In this scenario, it is simpler to modify the generated XSLT slightly, by changing the single op_nullable field from false to true.