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Rules for using the free form reference format

  • Continuation of lines

    Non-numeric literals can be continued over several lines. The line continued in this way is called a "continued line", the following lines are called "continuation lines".

    The literal to be continued must be terminated by a closing literal delimiter followed immediately by a hyphen. This may only be followed by blanks. The first character in the continuation line which is not a blank must be the same quotation mark as that used in the opening literal delimiter. The character following this is interpreted as the next character of the continued literal.
    At least one character of the actual literal must be contained in the continued line and in the continuation line.

    All characters belonging to an indicator or separator which consists of several characters must be contained in the same line. They may not be separated by blanks. A duplicated delimiter which represents a single delimiter within a literal must also be contained in one line.

  • Blank lines

    A blank line is a line that contains only blanks or no characters at all. A blank line may appear anywhere within a compilation unit.

  • Comments

    A comment consists of the comment indicator ("*>") followed by any text. All characters after the comment indicator up to the end of the line are comments.
    Any character from the computer’s character set may be used in the comment text. Comments are only used for documentary purposes and have no effect on the meaning of the compilation group.
    A comment can be either a comment line or an inline comment.

    • Comment lines

      The first character in a comment line is a comment indicator. A comment line may occur anywhere in a compilation group.

    • Inline comments

      A comment indicator which is preceded by blanks constitutes an inline comment. An inline comment can occur in any line of a compilation group except in continued lines.