Transforming a single xml to many documents

Question

I have to create a mapping between two xsd schemas, where the input document contains a list (sequence) of elements, each of which maps to a single output document. Moreover, each output document should include top level input data that is not a part of the list. To illustrate the problem, the input document contains data about a customer (contact info, etc) and list of invoices for them, and the output should be multiple documents, each containing one invoice and the customer data.

Can I somehow do this using DataMapper or some other approach? If I create a mapping between the input list elements and the output document, DataMapper will output an aggregation of all the created output documents. It also seems that I can not refer to the input top level elements from inside the "list element to output document" mapping.

Answer 1

Supposing root element in your source XSD contained a list of "Item" elements, you could first split the document into Items:

<splitter expression="#[xpath('//Item')]" doc:name="Splitter" enableCorrelation="IF_NOT_SET"/>

And then after the splitter use a DataMapper to map the Item elements to a target element in your other XSD. DataMapper requires that "Item" also be a root element in your source XSD in order to do the mapping from XSD to XSD. If it's not possible/desirable to make "Item" a root element in the source XSD, then you could create a sample XML and use DataMapper to generate an XSD from that. Otherwise you could roll your own transformer or use the XSLT transformer.