The fields to, recipients, subject and text can contain JSF-like expressions. For more information about expressions, see the section called “Expressions”

The variables in the expressions can be : swimlanes, process variables, transient variables beans configured in the jbpm.cfg.xml, ...

These expressions can be combined with the address resolving that is explained later in this chapter. For example, suppose that you have a swimlane called president in your process, then look at the following mail specification:

<mail actors="#{president}" subject="readmylips" text="nomoretaxes" />

That will send an email to to the person that acts as the president for that perticular process execution.