Scope note

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This property symmetrically identifies a situation in which the starting point and the ending point for an instance of E2 Temporal Entity is equal to the starting point and the ending point of another instance of E2 Temporal Entity, respectively.

This property is only necessary if the time span is unknown (otherwise the equivalence can be calculated).

This property is the same as the "equal" relationship of Allen’s temporal logic (Allen, 1983, pp. 832-843).

This property is transitive.

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