16.10. Comments in DRL files

DRL supports single-line comments prefixed with a double forward slash // and multi-line comments enclosed with a forward slash and asterisk /* …​ */. You can use DRL comments to annotate rules or any related components in DRL files. DRL comments are ignored by the decision engine when the DRL file is processed.

Example rule with comments

rule "Underage"
  // This is a single-line comment.
  when
    $application : LoanApplication()  // This is an in-line comment.
    Applicant( age < 21 )
  then
    /* This is a multi-line comment
    in the rule actions. */
    $application.setApproved( false );
    $application.setExplanation( "Underage" );
end

重要

The hash symbol # is not supported for DRL comments.