User invoked custom "Export to XML" functionality

I'd like to provide a custom button in our application that allows the user to save a view of the selected record as XML. Much in the way developers and administrators can with entities such as Run Time Events and Datamaps.

I need to be able to transform the IO instance first using a Data Map, convert to XML and then prompt the user to save the file locally. The Workflow would look something like:

Siebel EAI Adapter (Query) -> Data Map (Execute) -> IO to XML -> Prompt User to Save

Is there a way to provide the "Prompt User to Save" step, using OOTB Business Services?