This filter allows you to project series of events (having a selected value for the selected key (classifier / global event attribute / attribute)) onto only its first event.
- The input log is available.
- The input log has at least one classifier.
- The input log has at least one event.
At the top left, you can select the key. A the middle left, you can select the values for the selected key. An overview of the directly-follows relation for the values is shown on the right. At the bottom left, you can select whether to filter the selected values in (project series of events on the first) or out (project on events that would be removed if filtered in).