Challenges in Knowledge Discovery: Structured Repositories and Multimedia Content

Recent trends in structure and content of global knowledge spaces present new challenges to the field of Knowledge Discovery. Very large, highly structured repositories are increasingly replacing smaller, flat information spaces. Such repositories are often filled with multimedia documents, including image, audio and video data. This publication briefly outlines the underlying trends and discusses implications on approaches to Knowledge Discovery. Some examples for applications accomodating these implications are presented and analysed for lessons learned which can be incorporated in designing future Knowledge Discovery systems. Emphasis is given to the visualisation of hierarchical structures and to cross-media knowledge mining, two fields crucial for adressing future challenges to Knowledge Discovery.