The Sequence Mediator refers to an already defined sequence element, which is used to invoke a named sequence of mediators.
Syntax
A sequence ref token refers to a <sequence> element, which is used to invoke a named sequence of mediators.
<sequence key="name"/>
UI Configuration
In the "Sequence Mediator" panel you can give the name of the sequence, you want to refer to or select it from the registry by clicking the appropriate Registry Browser link. See more information about Registry Browser in Registry Browser and Namespace.