3 Rules helper function reference

• General expressions
  Use basic JavaScript expressions in your rules to perform a variety of tasks and validations.
• Date and time functions
  Compare and manipulate date and time values.
• Repeating form functions
  Find or evaluate a value in a repeating form.
• Two-section form functions
  Find or evaluate a value in a two-section form.
• Control the behavior of a rule
  Control how a rule behaves, whether it relates to a study's version, visits in the study or the JavaScript expression logic.
• Detect missing data
  Use this example of a custom Javascript rule when you want to find missing data.
• Multiple choice question functions
  Modify a value in a multiple-choice type of question.
• Multiple visit schedules and cycle visit functions
  Control data collection on multiple visit schedules and cycles visits.
• Formatting and other functions
  Format messages and queries and perform other useful operations.