MHDS Specification 11.1 defines the Communication object.
| Attribute | Data Type | Description |
| COMMUNICATION | String | Random alphanumeric ID |
| CLIENT | String | Client’s ID |
| OFFICE | String | Office’s ID |
| TYPE | String | Object type in all-caps (e.g. “BOOKING”) |
| STAMP | Datetime or String | Date & time of delivery |
| MSG | String | ID of type (e.g. ID of booking) |
| IMPORTED | String or Int | See S10.1 & S10.2 |
| USER | String | Therapist’s ID |
MHDS Specification 11.2 requires a Communication to be created whenever a notification is sent to a Client.
MHDS Specification 11.3 requires a Communication log.