About Wonsuk is a senior research staff in ETRI from 2003. He has over 10 years of research experience in the web domain ( e.g. web services, mobile web, ubiquitous web and etc. ) and is an editor of 5 specifications in the Media Annotation WG and Device APIs and Policy WG of W3C. In addition he is a member of the HTML WG and Web application WG. He is the Chair of W3C HTML5 Korean Interest Group, a Co-ordinator of the W3C Korea Office and a chair of the HTML5 AG(Ad-hoc Group) of mobile web 2.0 forum in Korea.