In the remainder, we will use whatever notation is most suitable. Definition 4.3 specifies a precise but very generic description of an event log that can be used for various purposes. Definition 4.4 describes a very simple format without any attributes. This format is useful for explaining simple process discovery algorithms that are not using the information stored in additional attributes. For simple event logs, we focus on a single attribute (typically the activity name). As shown, any event log L can be easily converted into a simple event log L.