... 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] ... 237temporal insert transactionand, 235V_Allen_Example to illustrate,315–316Allen relationship queries,313–342claims processing example,343–346point in time to period of time, 333–341point in time...