Scope note

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This property specifies that the temporal extent of the domain instance A of E2 Temporal Entity starts before or simultaneously with the start of the temporal extent of the range instance B of E2 Temporal Entity.

In other words, if A = [A^start, A^end] and B = [B^start, B^end], we mean A^start ≤ B^start is true.

This property is part of the set of temporal primitives P173 – P176, P182 – P185.

This property corresponds to a disjunction (logical OR) of the following Allen temporal relations (Allen, 1983): {before, meets, overlaps, starts, started-by, contains, finished-by, equals}

In a model with fuzzy borders, this property will not be transitive.

This property is irreflexive.

Figure 12: Temporal entity A starts before or with the start of temporal entity B. Here A is longer than B

Figure 13: Temporal entity A starts before or with the start of temporal entity B. Here A is shorter than B

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