XKeyscore sourcecode published
twitter.com
twitter.com
It would be interesting to see where the data is transmitted to from the monitoring nodes.
It is probably a DSL.
e: """XKeyscore provides a modular architecture in which tens of thousands of small computer programs, or rules, written in XKeyscore's specialized programming languages called Genesis and XKScript as well as general-purpose languages such as C++ and Python,"""
well that answers that