1. Semantically Enhanced Desktop Search Using Directory-Based Clustering and Wordnet Knowledge Ştefania GHIŢĂ

2. Forschungszentrum L3S 29.10.2004Hannover2 Content Project Overview Google Purpose Structure Photo Prototype Offline Content Prototype Conclusions

3. Forschungszentrum L3S 29.10.2004Hannover3 Project Overview Background Search No personalizationuser preferences No context Topic classification in DMOZ Purpose Contextualize / personalize search using additional metadata Advantages Precision of search Expresiveness of search results

4. Forschungszentrum L3S 29.10.2004Hannover4 Google A possible solution – indexing data on the PC (Google): Increase search efficiency Doesnt use specific characteristics of the user like : Folder hierarchies Browser caches

5. Forschungszentrum L3S 29.10.2004Hannover5 Purpose Finding new solutions for: Increasing precision of search according to the users profile Expresiveness of search results by adding additional information to the search Ranking the search results Metadata as the answer to these problems

6. Forschungszentrum L3S 29.10.2004Hannover6 Structure How to characterize and obtain a user profile Define metadata models for different types of information Automatically generating such metadata Enriching data by adding additional information: Wordnet Extending additional information using file structure and user behaviour Search engine that uses the metadata

7. Forschungszentrum L3S 29.10.2004Hannover7 Photo prototype /My Pictures/ Holidays/ Germany/ Hannover/ Rathaus/ building.jpg Holidays … building date XX 0 (pixels) X

8. Forschungszentrum L3S 29.10.2004Hannover8 Enriching Data with Wordnet Holidays/ Germany/ Hannover RDF Add Wordnet extensions: Synonims Holonyms (Germany is a part of …) Meronyms (Germany has part …) Hypernims (Holiday is a kind of …) Hyponims (… is a kind of Holiday) Troponyms

9. Forschungszentrum L3S 29.10.2004Hannover9 Example C:\Stefi\ C:\Stefi\L3S\ beautiful plant establish implant cat kat guy cat-o'-nine-tails big_cat vomit Caterpillar computerized_tomography Tue Oct 26 17:36:44 CEST 2004 291851

10. Forschungszentrum L3S 29.10.2004Hannover10 Offline Content Prototype Additional information for the users profile Browsing behaviour Relevant results Additional context for results Structure: ID of the page Date of access Link from which the user came Links accessed on the page Others annotations of the content

11. Forschungszentrum L3S 29.10.2004Hannover11 Conclusion Metadata models for contextualized search for different types of files Tools for automatically generating metadata Tools for enriching metadata Search engine and algorithms that use the metadata