Barcode: simple application, little problem

Hi! I'm using LiveCycle ES Preview...

I created a simple short live process in which there is a watched folder where i put jpg, tiff or flat pdf with more than one barcode.

At the beginning of the short live process I use the Decode PDF 417 Component and I save the content of the barcodes in a document object.
Then I use the extract to XML components and I have x output files as x are the barcode on the form. That is: 2 barcodes, two output files (that are the XML file with the datas).

Now, if I want to write those datas in a DB on a single line, how can I do in order to capture data from this XML file and transferred them to a DB (possibly all done within the workbench)?

Thanks,
ABello