FIRST-VARIABLE-NAME( ) Request variable element name

The FIRST-VARIABLE-NAME( ) function can be used to analyze the format of complex variables, primarily in combination with the NEXT-VARIABLE-NAME( ) function. FIRST-VARIABLE-NAME( ) can be applied to all aggregates and lists. FIRST-VARIABLE-NAME( ) begins with the specified variable or variable element name and then supplies the name of the first variable. If there is no lower level, FIRST-VARIABLE-NAME( ) returns *END.

Result type: STRING (<composed-name 1..255> or '*END')

FIRST-VARIABLE-NAME( )
FIRST-VAR-NAME( )

VARIABLE-NAME = string_expression