Availability/Location: Available from sourceforge's CVS repository, inside the project called digir (module name is java, directory org/calacademy/digir/engine).

Language: java

Documentation: http://digir.net/port/digir_portal_install.html

Description: Component responsible for encapsulating a DiGIR? network of distributed data providers. It receives requests from user interfaces or search agents, distributes them to the corresponding data providers, and integrates the responses in a single document before sending back to the requester.