updating template

What is the best way to update template items with data supplied from a client program. If a template has a couple of text frames and a graphic item, what is the best way to pass the data to the server so I can update the template? I will convert the template to an eps for later viewing, but was not sure how to get the data to the server - maybe an xml file? Is there an example similar to this supplied within sdk? I will keep searching, but any help would be Appreciated.

Thanks Steve