--environment_vars-- 
     --rexxhost-- 
     --structures-- 
     closecatalog() 
     closelocale() 
     convtolower() 
     convtoupper() 
     formatdate() 
     formatstring() 
     getcatalogstr() 
     getlocalestr() 
     isxxxx() 
     opencatalog() 
     openlocale() 
     parsedate() 
     strconvert() 
     strncmp()