This talk describes the desing and implementation of a semantic filesystem: Finally a file can be in multiple folders at once!

1. TagFS — Tag Semantics for Hierarchical File Systems Bonus Track: Introducing SemFS 2006 2006 Web3.0 2006 Stephan Bloehdorn Institute AIFB, University of Karlsruhe, Germany Olaf Görlitz ISWeb, University of Koblenz-Landau, Germany Simon Schenk ISWeb, University of Koblenz-Landau, Germany Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany talk Max Völkel Forschungszentrum Informatik, Karlsruhe, Germany

5. Example: del.icio.us Tagging Browsing Queries

11. What is a file system?

12. What is a file system? Organising files … An address given as path expression := Letter “ : “ ( “ “ name)* File System dir! response files folders name metadata metadata

13. What is a file system? … managing binary data File System metadata data 1011 write 1011 read 1011

14. What is a file system? … managing binary data File System rename metadata data

15. What is a file system? … managing binary data File System Add file or delete file metadata data

17. What is a virtual file system? Organising files and managing binary data op Virtual File System Looks and behaves like a file system… … but is no file system. It‘s implemen-ted differently. metadata data X Flickr CMS File System metadata data

18. What is a semantic file system? Organising files and managing binary data. op Semantic File System Flexible implementation. Unified metadata  unified search metadata data X Flickr CMS File System

26. BACKUP

28. Architecture

29. Tagging Ontology