If you want to organize the input document in a hierarchical way, or if you want to use some of the transformers defined in the service, do the following:
1. Create a custom input document record definition.
2. Update the input signature of the receive service to match the custom record definition.
3. Create a new bizDocMap service to transform the hierarchical document, as described in the custom input record definition, into flat table entries. This is a complex process requiring a lot of customization of the service; if you do this you must have a strong understanding of the Oracle Applications data schemas involved with the service.