String Expression

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<string internal function>|<string user-defined function>|<string constant>|<string variable> {<substring operations>} {<concatenation operations>}

The "string-expr" parameter represents one of several kinds of string elements, including string system functions, string user-defined functions, string constants, and string variables. A string in Business Rules always ends with a dollar sign, for example: STRING$

String expressions may utilize Substring operators (to specify that only a portion of the string be used) and the concatenation operator (to specify that multiple string expressions be combined together).

See also string constants and string variables, functions for string system functions, and the DEF statement discussion for more information about user-defined functions.