A request reception module receives a request for an document stored within document server. A parsing module parses the requested document to generate therefrom a corresponding document object model (DOM) including at least one object. An instruction obtaining module obtains a transformation instruction directed to a first object of the DOM. An object transformation module transforms the first object in accordance with the transformation instruction. A flattening module flattens the DOM to generate therefrom a corresponding transformed document. A transmission module transmits the transformed document to a requesting client program.