To complement the specification of protocols here, the reader may want to consult Fig-8.18 in [HafnerBreu09] for an overview of the functionality available in various specifications.
The choice of protocols has been guided by commitment to open standards as recommended in section 2 of [UNDP07]. This also serves to address Reqs. D1.2-2.4-MultiVendor, D1.2-2.5-Platform, and D1.2-2.6-Lang.