This is an old version (up to version 1.1). The new version contains XML for the submission and the response in addition to the original XML for the task and is available at https://github.com/ProFormA/proformaxml
This project is about creating an XML exchange format for programming exercises. The project is maintained by members of the ProFormA group within the eCULT project (www.ecult-niedersachsen.de).
(History: the first versions of the format are at http://teach.ecult.me/proforma/.)