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The remaining report components are the format items, which are the lines that will be printed on the report. Each format item may consist of any number of lines, made up of both constant and variable data.
Constant data is printed exactly as it is entered or drawn on the screen. It is mainly used to define headings and subheadings. Variable data is retrieved by the service procedure from a database, or from a report exit procedure, to be displayed on the report.
Variable data is prefixed by an ampersand (&) to indicate it is a database field, or an exclamation mark (!) to indicate it is a system field. Database field names are validated against the field names in the Data Fields Table for the report application. System field names are validated against the field names in the System Fields Table.
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