USoft Developer supports the use of Oracle (8i or earlier) outer join syntax, using the (+) notation. Outer joins can be nested and non-nested.
On all other database servers, this outer join syntax using (+) is translated to ANSI 92/ODBC outer join syntax.
Outer joins cannot be used in combination with the RELATE keyword, and cannot be used on component tables.
USoft versus ANSI 92/ODBC Outer Join syntax