What are some of the common SuperStream message types and their responses?

Below are some of the common SuperStream Messages, their meaning, and descriptions:

Message Type	Meaning	Description
CTR	Contribution Transaction Request	A message sent by an Employer that contains the contribution details of its employees as members of a superannuation fund. For example, an Employer submitting a contribution file will generate a CTR that is sent to the funds in the file.
CTER	Contribution Transaction Error Response	A message from a Superannuation fund that notifies an employer that a CTR has been rejected and refunded. For example, selecting the incorrect ESA for a SMSF will cause it to be rejected and generate a CTER the Employer can view.
MRR	Member Registration Request	A message sent by an Employer that contains new or changed details of its employees as members of a superannuation fund. For example, adding a new member or modifying an existing member’s details will generate an MRR that is sent to their superannuation fund.
MROR	Member Registration Outcome Response	A message from a Superannuation fund that notifies an Employer of the success or error condition of the new or changed member details received in a MRR from the Employer. For example, an Employer that creates and sends a MRR of a new member without a Member ID may then receive a MROR message from the fund that supplies that missing member’s Member ID.