Cloud Computing & its components

Rough review of 'UDDI, WAS, WSDL, WSSL Sandboxes, Unified Modelling Language, AMAZON EC2, VPC, VPN' plus other solutions for optimizing performance of distance communication. With the objective of better understanding the role of Application Protocol Interfaces,

W3C Specification;

Most of the APIs defined by this specification are interfaces rather than classes. That means that an implementation need only expose methods with the defined names and specified operation, not implement classes that correspond directly to the interfaces. This allows the DOM APIs to be implemented as a thin veneer on top of legacy applications with their own data structures, or on top of newer applications with different class hierarchies.