The Semantic Web
TheWorld-WideWeb continues to growand newtechnologies,modes ofinter- tions, and applications are being developed. Building on this growth, Semantic Web technologies aim at providing a shared semantic information space, cha- ing qualitatively our experiences on the Web. As Semantic Web technologies mature and permeate more and more application areas, new research challenges are coming to the fore and some unsolved ones are becoming more acute. These issues include creating and managing Semantic Web content, making Sem- tic Web applications robust and scalable, organizing and integrating infor- tion from di?erent sources for novel uses, making semantics explicit in order to improve our overallexperience with information technologies, and thus enabling us to use the wealth of information that is currently available in digital form for addressing our everyday tasks. These and other challenges brought several hundred of researchers, devel- ers,governmentworkers,venturecapitalists,students,anduserstoBusan,Korea fortheSixthInternationalSemanticWebConferencewhichwasheldjointlywith the 2nd Asian Semantic Web Conference (ISWC 2007 + ASWC 2007). We are excited to o?er this volume with the main proceedings of ISWC 2007 + ASWC 2007 to the growingcommunity of researchersand practitioners of the Semantic Web. The tremendous response to our Call for Papers from a truly international community of researchers and practitioners from 30 countries, the careful nature of the review process, and the breadth and scope of the papers ?nally selected for inclusion in this volume all speak to the quality of the c- ference and to the contributions made by the papers in these proceedings.