Any property (or property value) that has a property mode other than Single Value is an aggregate. An aggregate property has one of these structures:

• An array structure (for mode Value List or Page List)
• An unordered group structure (mode Value Group or Page Group)
• A page that can contain other properties
• A Java object

The ForEach JavaServer Page tag causes stream processing to iterate through the parts of a list or group aggregate property. This is similar to "enumerating a collection" in some programming languages. You can also search through elements in an activity step using the iteration facility, or use the Split-ForEach shape in a flow.

You can access elements of list properties using an index, a positive integer starting with 1. Elements of group properties are identified by a unique subscript value, a Java identifier.

Aggregate properties are sometimes called complex properties.

	index, iteration, Java identifier, property mode, Split-ForEach shape
	Foreach directive ForEach JSP tag Expressions — How to reference parts of aggregate properties Activity form — Completing the Steps tab — Iteration

Definitions — A