# Itemsets, repeating visits, and repeating forms

Itemsets and repeating forms may capture data multiple times for a given subject. Forms may also appear in repeating visits. You can report on data that was collected at different iterations of itemsets, repeating forms, and repeating visits using index elements from the InForm Ad Hoc Reporting tree to identify specific itemset, form, and visit instances.

Note: The Internal IDs folders also contain the following report elements: Form Index, Itemset Index, and Visit Index. While these elements also identify specific instances of repeating forms, visits, or items, they return the actual database value that is assigned to these instances.

- Form index—The report topic for any repeating form contains a Form Index report element. Use this element to separate data from each instance of the repeating form.
- Itemset index—The report topic for any Add Entry form contains an Itemset Index report element. Use this element to separate data from each instance of the itemset.
- Visit index—The report topic for any form or itemset that appears within a repeating (unscheduled) visit contains a Visit Index report element. Use this element to identify the visit instance in which data was gathered.

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