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Data Control Block

A Data Control Block (DCB) is a description of a dataset in IBM mainframe operating systems, such as OS/360, MVS, and z/OS. A DCB is coded in assembler programs using the DCB macro instruction (which expands into a large number of "define constant" instructions). High-level language programmers use library routines containing DCBs.

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Data Control Block

Nodes27
Edges26
Triples0
Avg. degree1.93
Density0.074074
Components1

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Important terminology

control block dcb operating dataset file systems data many statement may logical subroutines ibm 360 define structure dcbs zero specified

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