Glossary

ALIB (Allocation Library)

An Allocation Library is the internal file allocations format of the application. The ALIB is a partitioned data set that consists of members created through the ALIB Editor or JCL Converter.

CLIST (Command List)

A Command List is an executable sequence of TSO commands, subcommands, and command procedure statements.

Conditional Breakpoint

A Conditional Breakpoint stops program execution at a specified statement when the WHEN command statement is true. The W when-name Intercept panel is then displayed. These breakpoints are controlled with the WHEN and OFFWHN commands.

Frequency Counter

The Frequency Counter counts the number of times a statement has executed. Frequency counting can be turned on or off with the FREQ command.

Global Conditional Breakpoint

The Global Conditional Breakpoint instructs the application to test for a specified condition before every executable statement. The application halts the program before executing the statement that would cause the condition to test true. Global conditional breakpoint are set on the When panel. Compare with Local Conditional Breakpoint

Intercept or Breakpoint

An intercept/breakpoint stops the test and displays the executable statement at the point of intercept. The next statement to be executed is highlighted. This panel is called the Intercept panel and is displayed by any of these conditions:

Initial entry
Program abend
Pressing the Attention key
A breakpoint has been encountered: (a) Conditional, (b) Unconditional, (c) at entry, (d) at exit
STEP command
NEXT command

Line Command

A Line Command is a command entered in the left-most field on a line of the program listing while at an Intercept panel.

Load Module

A Load Module is an entity processed by the linkage editor to produce a program that is executable by the operating system.

Local Conditional Breakpoint

A Local Conditional Breakpoint instructs the application to test for a specified condition only before execution of a particular statement. The application halts the program before executing the specified statement if execution would cause the local condition to test true. Local conditional breakpoints are set with the C or W line commands. Compare with Global Conditional Breakpoint.

Proclib

Proclib is the Procedure Library, a library used for expanding procedures found in JCL during conversion.

Program-ID

The Program-ID is used by the COBOL compiler to identify the program and link edit it to the load module. It is specified in the IDENTIFICATION DIVISION of the COBOL program.

PROTSYM

The PROTSYM is the VSAM file that contains the symbolic information and source listings for your programs.

Step Count

The Step Count is used with the STEP command. It specifies the number of verbs to be executed when the GO command is entered. When the count is reached, the Step Count Intercept panel is displayed.

Unconditional Breakpoint

An Unconditional Breakpoint stops program execution at a specified statement whenever the statement is encountered and displays the Breakpoint Intercept panel. These breakpoints are controlled with the AT and OFF commands and the A (or U) and O (or X) commands.

Variable Change Breakpoint

A Variable Change Breakpoint instructs the application to halt program execution if the value of a specified data item changes. Variable change breakpoints can be set with the V line command or on the When panel.