First release of Data Acquisition Backbone Core

New experiments at FAIR require new concepts of data acquisition systems. Instead of building hardware trigger systems with strict latency limitations, it is intended to use self-triggered electronics. Front-end components should be time synchronized and will provide data with time stamps. Data streams from many of such components should be forwarded over a powerful sorting network to an event building farm. The Data Acquisition Backbone Core (DABC) is designed as a general purpose software framework for the implementation of such data acquisition systems. It is based on C++ and Java. A first version is now published and available.