The document outlines Jie Bao's research background and overview, including work on linked ontologies and linked data using semantic wikis. It discusses a modular ontology approach called P-DL that allows importing between ontologies similar to citation. It also describes using a semantic wiki to generate linked data from wiki revision histories and other semantic data. Future work includes applying these techniques to government data and improving scalability.

1. Towards Linked Ontologies and Data on the Semantic Web Jie Bao , Rensselaer Polytechnic Institute baojie@cs.rpi.edu, http://www.cs.rpi.edu/~baojie Oct 1st, 2009

3. Personal Background

4. Research Overview /48

5. Research Overview They are all about the power of linking…

6. Research Overview Linked Ontologies Linked Data

8. Roadmap Semantic Web

9. Why not owl:imports? owl:imports

10. Why not owl:imports? owl:imports (Alice, 2001) (Bob, 2009) Analogy: Paper Writing in the OWL fashion Recent development in Web… In this paper, we extend the algorithm A proposed by (Alice,2001) … Recent development in algorithms … In this paper, we present two algorithms A and B to …

11. Why not owl:imports? (Bob, 2009) Analogy: Paper Writing in the OWL fashion In this paper, we extend the algorithm A proposed by In this paper, we present two algorithms A and B to … Recent development in algorithms … Recent development in Web…

12. P-DL: Importing akin to Citation P-DL imports (Alice, 2001) (Bob, 2009) Paper(Bob2009) {Bob2009} ⊑  propose.{AlgC} {AlgC} ⊑  extend.{ AlgA } {Bob2009} ⊑  cite.RecentDev Paper(Alice2001) {Alice2001} ⊑  propose.{ AlgA } {Alice2001} ⊑  propose.{AlgB} {Alice2001} ⊑  cite.RecentDev [ISWC 2006; ASWC 2006; AAAI 2007, AAAI 2008] P-DL = Package-based Description Logics

13. P-DL: Semantics People Animals O 1 O 2 Only “relevant” local domains are connected Expressions are interpreted in local domains (e.g., neg)

14. Modular ontology languages: Comparison Distributed DL E-Connection P-DL What can you import? Nothing Concept name, Nominal name Concept , Role, and Nominal name What can you do with the imported names syntactically? (bridge rules between concepts and between roles) Use it in the range of a (link) role Free use, except that imported roles can not be used in role inclusions What is the result semantically? Decidability with BR between concepts. Decidability Decidability , Transitive Reusability, Preservation of Unsatisfiability

15. Roadmap Semantic Web

17. P-DL Federated Reasoning Dog Dog ⊑ Animal P 2 P 1 What is a “Dog”? “ Dog” is a type of “Animal”

18. P-DL Federated Reasoning messages

19. Roadmap Semantic Web

21. Private Knowledge Locally visible : Has date Q: Has date? A : Unknown Bob’ schedule ontology Q: Busy? A : Yes Q: Has dinner? A : Unknown indistinguishable

22. Privacy-Preserving Reasoners More informative More general Dummy Reasoner “ Combina-tion Safe” Reasoner Naive Reasoner Gives information Always answer “U” ? Always answer faithfully Safety scope All ontologies Ontologies that have no hidden knowledge

26. Roadmap Semantic Web

30. Semantic History (v2) [SDOW 2009]

32. Semantic History: Example (Provenance tracking) Who has changed the first name of James Hendler? http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_4

33. Semantic History (v2): Example (Statistics and Visualization)

34. Other Data Generation Services A few other SMW extensions I have worked on:

35. Roadmap Semantic Web

36. Concept Modeling Person Name Role Alias Affiliation Project Name Member Issue ID Project Assignee Jim Hendler Professor hasRole Person rdfs:subClassOf Alice John hasUncle Alice Bob John isParentOf isBrotherOf RDF Modeling Relational Modeling Rule Modeling

37. Rules: Logic Programs RightHanded(x):-Person(x), not LeftHanded(x). {{LP Rule |body= 1::Person; 1:not:LeftHanded |head= RightHanded }} Example : every person is by default right-handed, unless that person is known to be left-handed: See details at: http://tw.rpi.edu/proj/cnl/Template:LP_Rule [ACITA 2009]

39. Roadmap Semantic Web

40. Semantic Wiki: Application Workbench [ASWC 2009]

42. Case Study: CNL Wiki Class(Rabbit partial intersectionOf(animal restriction(eat someValuesFrom(FreshVegetable))) OWL: “Rabbit is Animal and eats some fresh vegetable” Us wiki templates to create OWL meta-model extensions for SMW Form-based editing interface associated with templates

43. Case Study: CNL Wiki

44. Case Study: RPI Map /48

48. Long-term Goal Email Picture Phone Call Shopping music video Web Server Farm

53. Backup

54. P-DL: Additional Properties Dog Dog⊑ Animal Pet Animal O 1 O 2 O 3 ⊑ ⊑

55. P-DL Federated Reasoning Bob2009 Alice2001 cite

57. Privacy-Preserving Reasoning Queries Yes Unknown

59. Semantic MediaWiki SMW: What you edit (Modeling Script) what you see To author knowledge typed link (property)

60. Semantic MediaWiki SMW: What you edit (Querying Script) what you see To retrieve knowledge

63. Case Study: RPI Map