Introduction to the Mapping Facility › Overview › Input/Output Operations

Input/Output Operations

At runtime, stored records that are associated with the map are bound to areas of program variable storage that are defined by the CA ADS dialog or application program that uses the map. Values are transmitted on output and input operations:

• On output (mapout) operations, values in record elements used by the map can be transmitted to the map along with any fixed character strings (that is, literal fields) that are defined for the map. The amount of data that is transmitted is determined by the runtime application and by specifications made for the map during map-definition time.
• On input (mapin) operations, values that a user supplies and that the map is prepared to receive are transmitted to program variable storage.

Note: For more information about CA IDMS I/O modes and for programming considerations that affect modes of I/O, see the CA IDMS DML Reference Guide for COBOL, CA IDMS DML Reference Guide for Assembler, or the CA IDMS DML Reference Guide for PL/I.