|  | ## Collect

#### Synopsis

Joins multiple input objects to a single collection.

#### Description

This operator joins a variable number of input objects to a single collection. If the input objects are collections themselves and the "unfold" parameter is checked, the output will be the union of the elements of all input collections. After merging objects into a collection, the Loop Collection operator can be used to iterate over this collection. The Select operator can be used to retrieve a certain element of the collection. Note: In the process layout view, collections are indicated by double lines.

#### Input

- input 1:

#### Output

- collection:

#### Parameters

- unfold: Determines whether collections received at the input ports are unfolded.

#### ExampleProcess