As semantic technologies prove their value with targeted applications, there are increasing opportunities to consider their application in social contexts for knowledge, learning, and human development. Semantic Web and Knowledge Management has been accepted as a critical enabler aiming to in crease knowledge-related performance by better use of intellectual assets, in addition to which many governments are forced to increasingly deal with knowledge services that form larger parts of the global economy and society. Thus there are recent examples of applications of semantics for empowering knowledge management or better supporting knowledge services for social networks. In this edited book we explore the poten tial.