Challenge to the Network Scientists arising from information arising on the Semantic Web

1. Semantic Web Science Jim Hendler Tetherless World Professor of Computer and Cognitive Science Assistant Dean of Information Technology and Web Science Rensselaer Polytechnic Institute http://www.cs.rpi.edu/~hendler @jahendler (twitter)

2. Following Lazlo

4. Sem Web 2010 4/2010

5. Semantic Web 2010 7/2010

6. Semantic Web 2010 11/2010

7. Sem Web 2010 7/2010

8. Sem Web 2010 8/2010

11. FOAF Network has been explored as Social network per se

13. OGP use growing quickly Facebook incentivizing use of RDFa like buttons 15,178 sites of top 1,000,000 as of 3/3/11

14. OGP creates a fast-growing, multiply-labeled, network FB reports ~ 10-15% of > 3,000,000 likes per day!

15. Important Real World Use Case: Government Data Sharing January 1, 2009 “ Openness will strengthen our democracy and promote efficiency and effectiveness in Government.” --- President Obama Putting Govt Data online- Data.gov.uk beta May 21, 2009 January 19, 2010 data.gov.uk online May 21, 2010 data.gov online data.gov relaunch with semantic web featured June30,2009 December 8, 2009 “ Open Government Directive” released 2009 2010 … 57 Data Sets ~6000 Data Set ~2000 Data Sets >305,000 Data Sets

16. Government Mashups and Applications See more than 50 of these at http://logd.tw.rpi.edu

17. Linking GDP of the US and China GDP of China (Billion Chinese Yuan ) GDP of the US (Billion Dollar) [Temporal Mashup] bea.gov + federalreserve.gov +stats.gov.cn

18. Linking GDP of the US and China GDP of China (Billion Chinese Yuan ) GDP of the US (Billion Dollar) [Temporal Mashup] bea.gov + federalreserve.gov +stats.gov.cn This mashup was built in less than 8 hours – including conversion of data, web interface, and visualization!

20. Govt data linked to Social Media Metadata

21. There is a lot of workflow information in the mix derive derive create derive revision Convert Access Enhance Version SemDiff

22. A Web Science Challenge How can we search for data?

23. Effective open govt requires exploiting the linked open govt network http://linkeddata.org/

24. Effective open govt requires exploiting the linked open govt network Government Data is currently about ½ the cloud in size (~15B triples), 10s of thousands of links to other data (within and without)

25. Linked Open Data on the Web Linked Open Data – over 23B triples

26. Linked open data network Linked Open Data – over 23B triples in a sparsely connected graph of highly connected graphs (and we know very little about the properties of most of these, let alone of the whole)

27. Linked open data network The good news: Web accessible, machine readable, anonymized and

28. Linked open data network Why is this hard? Doubling in size every 10 months, very varied “authorities,” many different kinds of linking used (same URI, (sort of) same by assertion, (sort of) same by inference, transitive closures, …)

29. A new buzzword… Linked Data (RDF, SPARQL) Semantic Web (RDFS, owl ) Web 3.0 Web 2.0 Web 3.0 extends current Web applications using Semantic Web, esp semantic and real-time search, technologies and graph-based, open data. Web (REST API)

32. Questions? New edition includes OGP, Data.gov, …