Comment commands:
    COMMENT comment text … .
    *comment text … .

Comments within a line of syntax:
    FREQUENCIES /VARIABLES=v0 v1 v2.  /* All our categorical variables.

COMMENT is ignored. It is used to provide information to the author and other readers of the PSPP syntax file.

COMMENT can extend over any number of lines. It ends at a dot at the end of a line or a blank line. The comment may contain any characters.

PSPP also supports comments within a line of syntax, introduced with ‘/*’. These comments end at the first ‘*/’ or at the end of the line, whichever comes first. A line that contains just this kind of comment is considered blank and ends the current command.