Universal Messaging supports the concept of plugins that actively process client requests made to nhp and nhps interfaces. There are currently 4 plugins:
File (Provides behavior similar to a web server)
XML (Browse resources and events in XML)
SOAP (Browse channels, queues and events using SOAP protocol)
Proxy Passthrough (Enable http/s requests for specific URLs to be forwarded to another host:port)
The plugins are discussed in more detail in the section Plugins.