bdfm1m1dMessages (System Error, Online, Offline) and Master Glossary

T

technical LREC (TLREC)
A logical record (LREC) used with block indexing or B+Tree indexing to locate data in a subfile. These LRECs are maintained by the TPFDF product and are not directly accessed from application programs.

TLREC
Technical LREC.

top-level index file
The highest file in an index structure. The top-level index file can reference a detail file (lowest level) or an intermediate index file. See also detail file, intermediate index file, index file.

TPF
Transaction Processing Facility.

TPFDF Distributed Data Access (TPFDF/DDA)
A feature of the TPFDF product that propagates data from a TPFDF hierarchical database to a DB2 relational database.

TPFDF recoup
An extension to TPF recoup phase 1 that allows pool records in TPFDF files to be identified using database definitions (DBDEFs).

TPF/MVS
Synonym for Airline Control System (ALCS).

traditional (P-type) file
A file that does not contain logical records (LRECs), and was created using TPF or ALCS file access macros or functions (for example, a FINDC or FILEC macro). Traditional files can be defined to the TPFDF product as P-type files using a DSECT macro and a DBDEF macro, which allows certain TPFDF macros, functions, and utilities to be used with the file.

trailer
Synonym for block trailer.

Transaction Processing Facility (TPF)
A stand-alone, real-time operating system designed for transaction-driven applications requiring speed, reliability, and data currency.

T-type file
A file that is a temporary logical record (LREC) in a W-type file.