Abstract
In the last few years, semantic technologies are continuously maturing and many applications are adopted in various field. To take a step towards overcoming the knowledge acquisition bottleneck, the challenge of generating semantic content persists. It usually requires the involvement of humans, thus motivations and incentives mechanisms that might foster human participation in the semantic content creation should be analysed. We review motivation structures of different successful communities (online communities, social web communities, open source software communities), analyse motivation mechanisms for incentivising semantic content creation, and provide some useful insights for the design of semantic annotation tools which would embed incentives mechanisms.