... type of time within which points in time and/or periods of time areordered.Components: type, point in time, time period.temporal entity integrityMechanics: (i) for episodes, the constraint that ... 308–309Pipelinesconcept of, 268data, 269inflow, 268lost data and, 295–296outflow, 268PK. See Primary keyPoint in time, queries, 382–383to Period of time, 333–341to Point in time, 341–342Point in ... in time 1[before] Period 1, 338–339,339f[before] Period 1, inverse ofrelationship, 338–339[before] Point in time 2, 341,342f[before] Point in time 2,inverse of relationship,341[during]...