Optional extPresence of this key indicates that the consumer is capable of using the resultData extension. The value should be a comma separated list of: url, text, or values agreed upon between consumer and provider https://www.eduappcenter.com/docs/extensions/result_data https://canvas.instructure.com/doc/api/file.assignment_tools.html#outcomes_service
Endpoint to where to passback the grades. It may be present without sorcedid (for instructors), indicating it's a graded context
Optional sourcedidUsed to identify the resource and the student, if not precent outcom passback is not available
LTI outcomes parameters provided by the consumer during the LTI launch https://www.imsglobal.org/spec/lti-bo/v1p1#overview