The DAP manages conversions through wrapper scripts that control input/output operations within specific applications. Any text based scripting language can be used to create these wrapper scripts as all that is required is that they follow certain naming and comment conventions (see http://opensource.ncsa.illinois.edu/projects/artifacts/POL/2.0/documentation/ScriptingManual.pdf for full details).
https://kmchenry@opensource.ncsa.illinois.edu/stash/scm/pol/polyglot.git
https://opensource.ncsa.illinois.edu/stash/projects/POL/repos/polyglot/browse/scripts