Old Value
Use this field to specify the text that is to appear in the Old Value column of the Audit Log form when this action runs.
To construct the entry using an expression, click the button to the left of this field.
The contents of this field must use this syntax:
scalarExpr
where scalarExpr is a literal string or resolves to an expression that can be displayed as text. This expression can be Numeric, String, Date, or Typeless.
When you click Event Actions form, the application "wraps" this content within an OLD( ) parameter, which yields this final syntax:
to return to theOLD( scalarExpr )
Note: If scalarExpr is a literal string value, the application automatically encloses
it in double quotation marks when returning it to the Event
Actions form. If scalarExpr is anything
else, the application does not enclose it in quotation marks.