The increase of Web capabilities leads to a deep qualitative change in the nature of cooperative activities. Nowadays, many activities are dynamic and take place in real time. Web practitioners, and applications, exploit, in rapidly varying ways, the richness of the Web to support users’ multifaceted activities. This causes dynamic changes in content, context, methods, meaning, and relationships to other pieces of knowledge, which affect the security and reliability of collaborations. The track theme explores how to share knowledge, views, facts, and opinions in a highly dynamic and secure Web-based environment. Coordinated, trusted, and secure sharing of information is an urgent topic in the Web research agenda. This creates the need for methods and tools to structure information sharing under correct conditions, such as preserving privacy and ensuring that distributed data and processes are consistently maintained in an evolving environment. Studies on knowledge engineering and artificial intelligence have proposed various Knowledge Organization Systems (KOS) (e.g. thesauri, ontologies, taxonomies, etc.), which play a crucial role in information recovery, disambiguation and identification on the Web. Reasoning techniques can also be applied, leading to a better decision or an awareness of events. 

W2T wants to explore the state-of-the-art on these topics, accommodating users’ practical experiences as well as trends and research topics, paving the way for future collaborative approaches to knowledge engineering.