QS:Relevance
From LimeSurvey Manual
Relevantie vergelijking
Beschrijving
All questions let you specify a relevance equation. This is the successor to conditions and support much more complex conditional logic.
Syntax Highlighting
Whenever you save the relevance equation, it will be evaluated and syntax-highlighted. Any errors will be color coded so that you can quickly detect and fix them.
Valid values
Any equation, using Expression Manager syntax, without surrounding curly braces.
Examples
Here are good examples of syntax highlighting