1. 1 1 1 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Advanced databases – Semantic Web Mining Bettina Berendt Katholieke Universiteit Leuven, Department of Computer Science http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Last update: 3 December 2008

2. 2 2 2 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Recap: “Standard” inference on the Semantic Web Match? To determine if there is a match, these questions must be answered: 1. What's the relationship between "SLR" and "Camera"? 2. What's the relationship between "focal-length" and "size"? 3. What's the relationship between "f-stop" and "aperture"? <PhotographyStore rdf:ID="Hunts" xmlns:rdf="&rdf;#"> Malden, MA 617-555-1234 <SLR rdf:ID="Olympus-OM-10" xmlns="http://www.camera.org#"> 75-300mm zoom 4.5-5.6 0.002 1.0 seconds 325 USD I am interested in purchasing a camera with a 75-300mm zoom lens size, that has an aperture of 4.5-5.6, and a shutter speed that ranges from 1/500 sec. to 1.0 sec.

3. 3 3 3 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/... But what about such situations? (1) [Queries and Smeagol from Grimnes (2008)] - But while the available knowledge bases know about Semantic Web experts, they don‘t have records of their publications - But while Bob has ranked several multi-media items before, he has not ranked any movies or books yet

4. 4 4 4 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/... But what about such situations? (2) - But while the knowledge bases know about the interests of Alice‘s husband and colleagues, they don‘t know about Alice‘s - But while Bob has sent some emails to Alice, and some as CC to her, none of them contain any topic information SELECT ?interest

5. 5 5 5 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ An application scenario for the Semantic Web: The Semantic Desktop From... Via... To...

6. 6 6 6 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ The big picture: Semantic Web Mining – a vision Slides: (hyperlinked on the Lecture Homepage)

7. 7 7 7 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Query 3

8. 8 8 8 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Query 2 – an unsuccessful attempt

9. 9 9 9 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Query 2

10. 10 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Query 1

11. 11 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Some background: Clustering RDF instances Slides: (hyperlinked on the Lecture Homepage) Note how this complements schema-based ontology matching with instance-based matching (of Semantic Web content that may or may not refer to ontologies)!  „Lightweight“ solutions, or: The Semantic Web focusing on data and their integration (as opposed to focusing on formal semantics)

12. 12 Berendt: Advanced databases, first semester 2008, http://www.cs.kuleuven.be/~berendt/teaching/2008w/adb/ Literature Stumme, G., Hotho, A., & Berendt, B. (2006). Semantic Web Mining: State of the Art and Future Directions. Journal of Web Semantics, 4(2), 124-143. http://warhol.wiwi.hu-berlin.de/~berendt/Papers/stumme_hotho_berendt_WS_2006.pdf Gunnar Aastrand Grimnes (2008). A Goal Directed Learning Agent for the Semantic Web. PhD Thesis, Department of Computing Science, University of Aberdeen.