Application Server XML Output !!!

Greetings I have to following problem with “Navision User Portal Application Server”: I created a dataport to export my data in the XML format. But I like to change the structure of the export. Here an example: <product_sku Caption=“Nr.”>0000010100011</product_sku> No An this should be the export i like: <product_sku>0000010100011</product_sku> 0 I like to change also the Name of CAPTION itself like: Navision: <short_description Caption=“de-DE”>Fruchtig-zartes Bouqet. Erinnert stark an grünen Apfel</short_description> and I like: <short_description xml :lang=“de-DE”>Fruchtig-zartes Bouqet. Erinnert stark an grünen Apfel</short_description> Whow can i realise this? Thanks a lot Andreas