We need a skilled xml expert who also knows Nexternal shopping cart system, to create the interface, Nexternal Tools, between the POS system and the Nexternal shopping cart. The POS system uses a Paradox database exporting and importing csv files. Nexternal demands all files in and out use their XML Tools. Possibly the initial upload can be via an Excel worksheet, formatted to their specs.
You would be working for the POS vendor. See uploaded file for xml specs, please.