bdfm1m11Messages (System Error, Online, Offline) and Master Glossary

F

fast link
The TPFDF mechanism for transferring control between high-access TPFDF routines.

fast-link table
A TPFDF table containing the main storage addresses of all TPFDF fast-link programs.

fast-link segment
A segment that contains high-access TPFDF routines.

field
A single data element in an LREC; for example, a date, name, or address.

file
Physically, a file comprises a collection of blocks, all having the same file ID. Logically, a file consists of LRECs contained in one or more subfiles. A TPFDF file is defined by a DSECT macro.

file ID
A 2-byte identifier in a block (record). It has the same value for all blocks (records) in a file. The file ID is included in the block header. Synonymous with record ID.

fixed file
A TPFDF file where the prime blocks of each subfile are contained in TPF or ALCS fixed file records. Typically, fixed files are permanently assigned to a specific function or file type. Contrast with pool file.

fixed-length logical record (LREC)
A logical record (LREC) where all fields in the record have a fixed length. See also variable-length logical record (LREC) and extended logical record (LREC).

fixed-length LREC
Fixed-length logical record.

fullfile
An operation that allows TPFDF processing to access more than one subfile in a file.