410. Federated Mission Networking is founded on a service oriented approach. The interoperability standards applicable to FMN Services are structured in accordance with the NATO C3 Classification Taxonomy [AC/322-N(2012)0092-AS1]. The C3 Classification Taxonomy is used to identify services, and associated Service Interoperability Points (SIP) where two Mission Network Contributing Participants will interface and the standards to be used by the relevant systems. The taxonomy is also used to structure this section, commencing with Communications Services and working up the Taxonomy from beneath.