Why not all the above? You can hack up a quick library (or find one online) that will take the output of a query and output in the selected format. Not sure w

Why not all the above? You can hack up a quick library (or find one online) that will take the output of a query and output in the selected format. Not sure what framework/language you are using but, something like this can be very easily done using PHPs inbuilt functions (ie: get from db and store in array..then output array as XML or JSON etc...).