bdfm1m13Messages (System Error, Online, Offline) and Master Glossary

H

header
Synonym for block header.

hold
A facility that allows multiple entry control blocks (ECBs) to share data and serialize their access to the data. When an application program opens a TPFDF subfile, the program can request that the TPFDF product hold the prime block. If a prime block is held, no other ECB can access logical records (LRECs) in the subfile until the application program releases it or closes the subfile.