Talk of Jie Bao, Li Ding, Deborah L. McGuinness. Semantic History: Towards Modeling and Publishing Changes of Online Semantic Data, In The 2nd Social Data on the Web workshop (SDoW2009), 2009 http://tw.rpi.edu/wiki/TW-2009-17

1. Semantic History: Jie Bao, Li Ding, and Deborah L. McGuinness Tetherless World Constellation Rensselaer Polytechnic Institute Troy, NY, 12180-3590, USA {baojie,dingl, dlm}@cs.rpi.edu pdf & slides: http://tw.rpi.edu/wiki/TW-2009-17 Towards Modeling and Publishing Changes of Online Semantic Data

2. Semantic History: Jie Bao, Li Ding, and Deborah L. McGuinness Tetherless World Constellation Rensselaer Polytechnic Institute Troy, NY, 12180-3590, USA {baojie,dingl, dlm}@cs.rpi.edu pdf & slides: http://tw.rpi.edu/wiki/TW-2009-17 WHAT Axel and Boris have done to the OWL Wiki and WHY Jim is now called James

4. Motivation Picture courtesy Matt Davies , Journal News, Jan 7, 2008 10/25/2009 SDOW @ ISWC 2009

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8. 10/25/2009 SDOW @ ISWC 2009 This becomes even trickier with “semantic wikis”

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10. Motivation 10/25/2009 SDOW @ ISWC 2009

11. Architecture Social Semantic Web Semantic History revision of author … … Publish REV1 REV2 Create 10/25/2009 SDOW @ ISWC 2009

13. Implementation on Semantic Mediawiki (SMW) 10/25/2009 SDOW @ ISWC 2009 Semantic MediaWiki

14. 10/25/2009 SDOW @ ISWC 2009 SMW The Semantic History (SH) extension captures edit actions Revision history User User makes edits Triple Representation of history Triplified revision history is added to and managed by the SMW Applications use the triplified revision history for various purposes SH Templates (customizable) SH Templates generate semantic descriptions of revision history {{ SH_Triple |…}} {{ SH_Add |…}} {{ SH_Delete |…}}

15. Data to Triples Example: Revision {{ SH_Rev |3353 |20090714211611 |User:Baojie |James Hendler }} 10/25/2009 SDOW @ ISWC 2009 Customizable! Customizable! Rev:3353 id 3353 Rev:3353 time 20090714211611 Rev:3353 author User:Baojie Rev:3353 about James Hendler

16. Data to Triples Example: Editing Summary “ SH_Summary” Template {{ SH_Summary | reason::Introduction wordsmithing ; source::http://www.w3c….; category:Grammar Fixing; }} 10/25/2009 SDOW @ ISWC 2009 Customizable! Customizable! Rev:3145 reason Introduction wordsmithing Rev:3145 source http://www.w3c…. Rev:3145 rdf:type wiki:Grammar Fixing

17. Usage Examples 10/25/2009 SDOW @ ISWC 2009

18. Provenance tracking Who has changed the first name of James Hendler? http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_4 10/25/2009 SDOW @ ISWC 2009

19. Query: Semantic Recent Change http://tw.rpi.edu/proj/semhis.wiki/index.php/Semantic_recent_changes 10/25/2009 SDOW @ ISWC 2009

20. Statistics Which domain has attracted more changes: University or Person? http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_5 10/25/2009 SDOW @ ISWC 2009

21. Temporal Reasoning Which papers of Jie Bao are "Tetherelss World Publication"? http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_8 10/25/2009 SDOW @ ISWC 2009

22. Future Work – Integration with other tools Data.gov wiki – Government data Wiki-based Ontology Editor 10/25/2009 SDOW @ ISWC 2009 http://tw.rpi.edu/proj/cnl http://data-gov.tw.rpi.edu/

24. Conclusions 10/25/2009 SDOW @ ISWC 2009

26. Backup 10/25/2009 SDOW @ ISWC 2009

28. 10/25/2009 SDOW @ ISWC 2009 But how to find that without manually reading 200+ pages? Which countries have outdated/missing 2008 GDP (nominal) figure on Wikipedia?

29. Revision {{ SH_Rev |3353|20090714211611|User:Baojie|Jin Guang Zheng}} Those pages are hidden from common users 10/25/2009 SDOW @ ISWC 2009

30. Template-based Triplification 10/25/2009 SDOW @ ISWC 2009 {{ SH_Rev |3353|20090714211611|User:Baojie|Jin Guang Zheng}} Template:SH_Rev Instance of the template: Revision [[id::{{{1}}}]] , about [[about::{{{4|NA}}}]] , on time [[time::{{{2}}}| ]] [[formatTime::{{DateFormat|{{{2}}}}}]] , by author [[author::{{{3}}}]] [[Category:Revision]] {{#if: {{{5|}}}| [[Category:{{{5}}}]] }}

31. Triple Changes A typical triple page {{ SH_Triple |RPI|DefinedBy|Jie Bao}} {{ SH_Add |1454|20090708190303|User:Baojie}} {{ SH_Add |M20090708235158|20090708235158|User:Baojie}} {{ SH_Delete |3305|20090713115342|User:Baojie}} {{ SH_Obsolete |1}} 10/25/2009 SDOW @ ISWC 2009

32. Editing Summary A revision page with semantic summary {{ SH_Rev |2462|20090712064807|User:Baojie|Main Page}} {{ SH_Summary |reason::to demo semantic summary; source::none; category:Test Edit; something not useful}} {{ SH_Minor }} How to explain summary is up to the wiki admin (by designing “Template:SH_Summary”) Customizable grammar 10/25/2009 SDOW @ ISWC 2009

33. Explanation Created by Uses template Doesn’t generate “member_of” assertions Generates “member_of” assertions Why Jie Bao is a member of the project ITA? http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_11 10/25/2009 SDOW @ ISWC 2009 one p ossible explanation of