Data Set Declaration

A data set is a file containing data. The elements of the file are records or members that are composed of items. An item can contain data; it can contain control information, or it can be a data set, set, subset, Access, remap, or link item.

A data set is similar to a file in that it contains data; however, it differs from a conventional file in the following respects:

  • Space within data sets is allocated and deallocated by the system.

  • The system is responsible for retrieving the records requested by the user.

  • Items in data sets can be data sets, sets, subsets, or Accesses.