The SCOT(Social Semantic Cloud Of Tags) ontology is to semantically represent the structure and semantics of a collection of tags and to represent social networks among users based on the tags.
The SIOC initiative (Semantically-Interlinked Online Communities) aims to enable the integration of online community information. SIOC provides a Semantic Web ontology for representing rich data from the Social Web in RDF. It has recently achieved significant adoption through its usage in a variety of commercial and open-source software applications, and is commonly used in conjunction with the FOAF vocabulary for expressing personal profile and social networking information. By becoming a standard way for expressing user-generated content from such sites, SIOC enables new kinds of usage scenarios for online community site data, and allows innovative semantic applications to be built on top of the existing Social Web. The SIOC ontology was recently published as a W3C Member Submission, which was submitted by 16 organisations.
Collaborative Knowledge Management, powered by the Semantic Web
Wikis and social software have revolutionized the ways we create and distribute knowledge. The Semantic Web has already begun to transform the ways we maintain, discover and share knowledge across platforms.
The KiWi - "Knowledge in a Wiki" - project proposes a new approach to knowledge management that combines the wiki philosophy with the intelligence and methods of the Semantic Web.