Translations:ExpressionScript - Presentation/3/en
From LimeSurvey Manual
LimeSurvey uses Expression Script which lets LimeSurvey support more complex branching, assessments, validation, and tailoring. It replaces how LimeSurvey manages Replacements, Conditions, and Assessments on the back-end. It also speeds up processing considerably since it eliminates most run-time database reads. Expression Script was developed by Dr. Thomas White (TMSWhite).