Description Web 2.0 has introduced new style of information sharing featuring mass user participation, social networking, heterogeneity of data sources, and a huge scale of information and knowledge, posing difficulties in discovering relevant information. The Semantic Web may contribute by providing a language basis and ontologies to support structuring, or introducing new ways to explore the information space. This may be achieved by combining semantics from semantic web resources with structure of the sharing platforms (tags, social acquaintances etc.) and automatic content analysis tools. This workshop targets integration arising from the mining of Web 2.0 information, multimedia content and knowledge with help of the Semantic Web.

DBpedia is the Semantic Web version of Wikipedia and enables you to ask sophisticated queries against Wikipedia data. The flickr wrappr extends DBpedia with RDF links to photos posted on flickr. For each of the 1.95 million DBpedia concepts, the wrappr generates a collection of flickr photos that depict the concept.

Scott Golder and Bernardo A. Huberman Information Dynamics Laboratory, HP Labs Abstract Collaborative tagging describes the process by which many users add metadata in the form of keywords to shared content. Recently, collaborative tagging has grown in popularity on the web, on sites that allow users to tag bookmarks, photographs and other content.