NATO is in the 2nd phase of its "NET-CENTRIC" or "Web enabled" transformation. NATO nations have ongoing C4ISR programmes and many of their legacy systems were industrialised or contracted before this Net-Centric transformation. The nations, like NATO, have the recurrent need to evolve their capabilities and converge to the NATO Network Enabled Capability (NNEC). Realizing the key NNEC goal of interoperability among "unexpected" parties remains a daunting challenge. Reference documents ...