Procedure interpreter

The procedure interpreter checks the following attributes:

• Is the first character in the procedure a slash (/)?
  Procedures must begin with a command call, i.e. with a slash (/).
  If the first character is not a slash, it is not a procedure. Execution is aborted.

• Is the slash followed by a SET-LOGON-PARAMETERS (or LOGON) command?If so, the procedure is a batch job and is rejected.

• Is the slash followed by the BEGIN-PROCEDURE or PROCEDURE command?BEGIN-PROCEDURE (or PROCEDURE) introduces non-S procedures; thus, the called procedure is not an S procedure. It is processed as compatible (see “Commands, Vol. 1-5” [3]).