Experiences of semantic tagging with Tilkut

There are two main approaches for adding metadata to web content: free user-generated tags and keywords based on taxonomies or semantic ontologies. There are pros and cons in both approaches, so benefits may be gained by combining these approaches. This paper presents a solution that utilizes both freely defined tags and predefined ontologies. To study suggestionbased semantic tagging we created a social bookmarking application called Tilkut. This paper describes the system and experiences from a small scale user study. Suggestions for more intelligent tagging solutions will be given