These are just examples. None of these attributes is mandatory. However, for these standard attributes we will assume some conventions. For example, timestamps should be non descending in the event log. Moreover, we assume a time domain T, i.e., #time(e) ∈ T for any e ∈ E. The transaction type attribute # trans(e) refers to the
life-cycle of activities. In most situations, activities take time. Therefore, events may point out for example the start or completion of activities. In this book, we assume the transactional life-cycle model shown in Fig. 4.3.
These are just examples. None of these attributes is mandatory. However, for these standard attributes we will assume some conventions. For example, timestamps should be non descending in the event log. Moreover, we assume a time domain T, i.e., #time(e) ∈ T for any e ∈ E. The transaction type attribute # trans(e) refers to thelife-cycle of activities. In most situations, activities take time. Therefore, events may point out for example the start or completion of activities. In this book, we assume the transactional life-cycle model shown in Fig. 4.3.
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