Release 10.1A: OpenEdge Data Management:
DataServer for Microsoft SQL Server

Values of output parameters you define when you create a procedure

When you call a stored procedure, you can specify the ordered list of positional parameters, or you can name them individually. To retrieve output parameter values from a stored procedure, request them with the keyword OUTPUT or INPUT-OUTPUT when you execute the procedure; your selected INPUT and OUTPUT parameter options must match the corresponding signature of the stored procedure at the data source.