5.2. Comments

Note

(updated to Drools 4.0)

Comments are sections of text that are ignored by the rule engine. They are stripped out when they are encountered, except inside semantic code blocks, like the RHS of a rule.

5.2.1. Single line comment

Figure 5.1. Single line comment

To create single line comments, you can use either '#' or '//'. The parser will ignore anything in the line after the comment symbol. Example:

rule "Testing Comments"
when
    # this is a single line comment
    // this is also a single line comment
    eval( true ) # this is a comment in the same line of a pattern
then
    // this is a comment inside a semantic code block
    # this is another comment in a semantic code block
end