[rules-users] Escape Character in Rules

Hi, I am using a DSL sentence within the JBRMS like this: [condition]There is an Instance with field of {value}=i: Instance(field=='{value}') When I enter a string for {value} in the rules editor that contains a "{" it is not shown in the source code of the rule and saving of that rule is impossible. There is no Error Message, but the saving dialog in not closing. So I wonder if there is any escape character, that I should use in the rule or is there something wrong with the DSL? Cheers Tobi