In several GeneXus objects, predefined variables of common use—called standard variables—are available.
Even though they are not shown by default in all types of objects, if you try to define a variable using the name of a standard variable, it will automatically appear with the standard variable's definition. You will not be able to modify its data type or otherwise redefine it. In other words, it is not possible to define user variables with those names in any object type.
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