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Section 2
System Data Items
Overview
System Data items can be considered as system-defined Global Setup Data items. They can
be referenced in the logic of Ispecs and Reports (and Global Logic for Ispecs or Reports).
The values of some System Data items can be changed, although many are read-only and
can be used only for reference.
COBOL Syntax Errors
The following list shows some circumstances when you may receive COBOL Syntax Errors:
$ For an MCP based LINC System, some System Data items can only be used in Reports
and Shadow Reports generated for use with the LINC Report Output Control System
(ROC). Including such items in non-ROC Reports will cause COBOL syntax errors
when the Report is compiled.
$ For an OS 2200 based LINC System, if you code certain System Data items for a
Shadow Report, to avoid COBOL syntax errors you must also code a PRINT.FRAME;
command for that Shadow Report (the PRINT.FRAME; command may never be
executed).
Conventions for this Section
The following general statements apply throughout this section:
$ System Data items can be assumed as valid for use in Ispec and Report logic, and for
Global Logic used in Ispecs or Reports, unless explicitly stated otherwise. System Data
items available in Global Logics depend on where the Global Logics apply (Ispecs or
Reports).
$ System Data items can be assumed as valid for all types of host (MCP based, OS 2200
based, and UNIX), unless explicitly stated otherwise.
$ Further restrictions may be contained in the individual System Data item descriptions.
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