[markjspivey]

for an open spec meant for your specific use case, check out "Tin Can API" / "Experience API" / "xAPI":

http://tincanapi.com/overview/

specifically the idea of the "Learning Record Store".

it is the new open standard for learning, training, and experience, etc... backed by the DoD and ADL to replace SCORM (previous standard used by things like Blackboard and MOODLE and LMSs 'learning management systems').

let me know if you have any questions, i work and research in this space.