Open Hypermedia Systems and Structural Computing : 6th International Workshop OHS 6 2nd International Workshop SC 2 San Antonio Texas USA May 30 – June 3 2000 Proceedings This book constitutes the thoroughly refereed post proceedings of the 6th International Workshop on Open Hypermedia Systems OHS 6 and the 2nd International Workshop on Structural Computing SC 2 held at the 11th ACM Conference on Hypertext and Hypermedia in San Antonio Texas USA in May June 2000.The 19 revised full papers presented were carefully reviewed and selected for inclusion in the book. All current issues on open hypertext systems and structural computing are addressed