From Emergency Information Interoperability Framework wiki
ORCHESTRA is designing and implementing the specifications for a service oriented spatial data infrastructure for improved interoperability among risk management authorities in Europe, which will enable the handling of more effective disaster risk reduction strategies and emergency management operations. The ORCHESTRA Architecture is open and based on standards. Its specifications are contained in a document called the Reference Model–ORCHESTRA Architecture (RM-OA) which is open and free of charge.
Download from http://www.eu-orchestra.org/publications.shtml.