Data series mapping options and the Data Mappings tab

When you add an item to a data series in the Data Series Summary tab of the Form or Study Event editor, you can specify the instances of the item that you want to be mapped to the data series:

• None—The item is not added to the data series.
• Always—The item is always mapped to the data series, on every form, in every study, and in the library.
• Form—The item is mapped to the data series only when the item appears on a specific section (or form, if the form has no sections). You can select this option for multiple sections or forms.
• Study Event—(Available only when a study event is selected.) The item is mapped to the data series only when it appears on any form in a specific study event. You can select this option for multiple study events.
• Study Event & Form—(Available only when a study event is selected.) The item is mapped to the data series only when it appears on a specific form in a specific study event.

This approach is recommended if the specifications for your rules are well known at the time when you are designing your data mappings. For example, if an item occurs in more than one form, and you know that your rules will reference the item in a specific form, you can map the item to a data series in the Form editor with a Form data mapping type.