File Management - IBM

From Diskette input
To ICF: Records are retrieved from the ICF file one at a time.
Display: Records are retrieved from the display one at a time. Type in the data for
each record and press the Enter key when the record is complete. A nonfield-level
device file must be specified. Diskette label information is ignored.
Database: Records are retrieved in sequential order. Diskette label information is
ignored.
Tape: Records are retrieved in sequential order. If a label value is specified in the
program, that value is used as the label for the tape file.
From Diskette output
To ICF: Records are written to the ICF file one at a time.
Database: Records are written to the database in sequential order.
Display: Records are written to the display with each record overlaying the
previous record. You can request each output record using the Enter key.
Printer: Records are printed and folding or truncating is performed as specified in
the printer file.
Tape: Records are written on tape in sequential order.
From Display input
To ICF: Records are retrieved from the ICF file one at a time.
Diskette: Records are retrieved in sequential order. Diskette label information must
be provided in the diskette file or on an override command. Refer to the Tape and
Diskette Device Programming book for a description of exchange types.
Database: Input records are retrieved.
Tape: Records are retrieved in sequential order. Tape label information must be
specified in the tape file or on an override command.
From Display output
To ICF: Records are written to the ICF file one at a time.
Database: Records are written to the database in sequential order.
Diskette: The amount of data written on diskette is dependent on the exchange
type of the diskette. Diskette label information must be provided in the diskette file
or on an override command. Refer to the Tape and Diskette Device Programming book
for a description of exchange types.
Tape: Records are written on tape in sequential order. Tape label information must
be specified in the tape file or on an override command.
Printer: Records are printed and folding or truncating is performed as specified in
the printer file.
From Display input/output
To ICF: Input records are retrieved from the ICF file one at a time. Output records are
written to the ICF file one at a time. The relationship between the input and output
records is determined by the application program.
Chapter 3. Using overrides 67