Within a function there are several possible sources for a field’s value; for example, a field may be found on the panel display, in a database file, or as an entry parameter. A CA 2E context specifies which source of a particular field to use. Different contexts are available at different points in a function’s action diagram.
A context is identified by a three-character mnemonic; for example, CTL - subfile control, RCD - subfile record, CON - constant data, and PAR - entry parameter. This mnemonic is prefixed to each field used in an action diagram to show the source of the field. For example, RCD.Date of birth means that the value of the Date of birth field displayed in the subfile record is to be used in the action diagram.
When you enter ? to view a list of possible contexts, the most sensible context appears at the top of the selection list.
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