The World Wide Web has become a unique source of knowledge on virtually any imaginable topic. It is continuously fed by companies, academia, and common people with a variety of information in numerous formats. By today, the Web has become an invaluable asset for research, learning, commerce, socializing, communication, and entertainment. Still, making full use of the knowledge contained on the Web is an ongoing challenge but also a promising chance for AI methods that can help to make the knowledge on the Web more accessible for humans and machines by capturing, representing and using information semantics. This workshop is meant as a forum for these issues and intends to nurture research and discussion in applying AI methods to problems on the Web.