This property specifies that the temporal extent of the domain instance A of E2 Temporal Entity starts before or simultaneously with the end of the temporal extent of the range instance B of E2 Temporal Entity.
In other words, if A = [Astart, Aend] and B = [Bstart, Bend], we mean Astart ≤ Bend is true.
This property is part of the set of temporal primitives P173 – P176, P182 – P185.
This property corresponds to the disjunction (logical OR) of the following Allen temporal relations (Allen, 1983): {before, meets, met-by, overlaps, starts, started-by, contains, finishes, finished-by, equals, during, overlapped by}.
![](data:image/png;base64,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)
Figure 8: Temporal entity A starts before or with the end of temporal entity B. Here A is longer than B
![](data:image/png;base64,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)
Figure 9: Temporal entity A starts before or with the end of temporal entity B. Here A is shorter than B