| Subject | English | German |
| comp., MS | event source | Ereignisquelle (The point of origin of an event) |
| comp., MS | event stream source | Quelle für den Ereignisdatenstrom (ssn) |
| comp., MS | event stream source version | Version der Quelle für den Ereignisdatenstrom (ssn) |
| construct. | source event | Anfangsereignis |