SUBLIST( ) Select element from SDF list

The SUBLIST( ) function returns the contents of the selected element of an SDF list. An SDF list is a string which is interpreted in accordance with the syntactical rules for operand lists in commands. Evaluation of the string with this function is meaningful only if it has the format ’(<element₁>,<element₂>,...<elementn>)’, where <element> is a sequence of characters _iwhich contain no commas outside pairs of parentheses.
The IS-SDF-LIST() function can be used to check whether a string is a list.

Result type: STRING

SUBLIST( )

LIST = string_expression
,POSITION = arithm_expression