| Field | Value | Default |
| groupid(*) | primary identifier of the course1 | |
| userid(*) | user identifier2 | - |
| courseid | Course identifier (according to the general setting of the course tool3 | - |
| cmd | 'add', 'shift', 'del' | 'add' |
(*) Mandatory fields
(1) According to the tool setting
(2) According to the tool setting
(3) This column is needed when the primary identifier of the group is its name, because the name is not a fully qualified identifier. Several groups can have the same local name across different courses.
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