From DeveloperWorks, Build an RSS aggregator using IBM WebSphere DataPower SOA Appliances multistep

The IBM WebSphere DataPower SOA Appliances multistep processing policy
system is a key part of appliance configuration. Version 3.6.1 of the firmware
includes a number of enhancements to multistep that provide functionality familiar
to programmers, including loops of actions, conditional execution of actions, and
the ability to execute actions in parallel. Explore how you can combine the new
features in multistep 3 to build an RSS feed aggregator.

Here is an example of the new Multi-Step feature in DataPower firmware 3.6.1 in action.