2.In DPCX,one of two parts of a relative data set that does not have to be stored contiguously with the other extent,but must contain contiguously stored records.

• 在操作系统DPCX中,相关数据集的两部分之中的一部分,它不必被存储在相邻的区域内,但必须含的是相邻的存储记录。