Procedure body

The part of an S procedure that follows the procedure head is referred to as the procedure body. It can contain normal SDF (or ISP) commands. These may be influenced by what is referred to as & replacement, i.e. by the current values of procedure parameters, by the current values of other variables and by accessing environment variables (e.g. user ID or current date). The procedure body may also contain SDF-P control flow commands; these serve to modify the sequence of command processing in accordance with the values of variables and functions.