Syntax notes

GIMDDALC control statements must each start on a new line.
GIMDDALC control statements may be continued on more than one line. SMP/E assumes a statement is continued if it did not find a period (.) before column 73.
SMP/E ignores columns 73 through 80. If data, such as a period, is specified beyond column 72, SMP/E will ignore it and indicate an error in the control statement following the one containing the data.
GIMDDALC control statements may contain comments. Comments start with /* and end with */. The first */ encountered after the initial /* will end the comment. A comment can appear anywhere within a statement. A comment after the ending period must start on the same line as the period, and you cannot start any additional comments after that final comment. For example, you can code a comment like this:
```
  DD(SMPTLIB) SPACE(5,5) DIR(20).  /* Comment after period continued
                                      on subsequent lines is OK.     */
```
However, you cannot code a comment like this:
```
  DD(SMPTLIB) SPACE(5,5) DIR(20).  /* Comment after period OK,       */
                                   /* but starting another comment
                                      causes a syntax error.         */
```
This causes a syntax error at the start of the second comment after the period.
Only one GIMDDALC control statement is allowed for a single data set.
At least one operand (other than DD) must be specified on each GIMDDALC control statement.
For SMPTLIB, only the SPACE, TRACKS, and DIR operands are allowed.