1. Dr. Jim Bowring Computer Science Department College of Charleston CSIS 690 (633) May Evening 2009 Semantic Web Principles and Practice Class 1: 11 May 2009

2. Class 1: Roadmap Web site Schedule Syllabus Resources Expectations Semantic Web Lectures and Discussion

3. What is a Web? Web of information - open > anyone can contribute organic > grows hodgepodge of content “mile wide, inch deep” How can we make the web more integrated and consistent?

4. Smart Web, Dumb Web Example of Dumb? = inconsistent = disconnected How to make Web Smart? smart web apps does web infrastructure itself need smarts? or just support consistency and availability?

5. Connected Web = Smarter Web Connected means web sites and pages stay coordinated > updates propagate flexible, distributed, connected data model Smart web supports a standard data model > Semantic Web

6. Examples http://attempto.ifi.uzh.ch/site/docs/screencast_acewi ki.mov http://attempto.ifi.uzh.ch/acewiki/geo/ http://attempto.ifi.uzh.ch/acewiki/

7. Distributed Web of Data How do we integrate Web applications? relational database backbone stored procedures transformational languages scripts Theme = primary representation of data is not for human eyes

8. Semantic Data, Semantic Web What if data items pointed to each other rather than web pages pointing to each other? URL (Uniform Resource Locator) vs. URI (Uniform Resource Identifier) A single, distributed model of information forms the Semantic Web infrastructure.

9. Features of the Semantic Web WWW: AAA A nyone can say A nything about A ny topic Network effect: everyone contributes to WWW = organic growth Will everyone contribute to the Semantic Web?

10. Disagreement Fundamental disagreement Deception Mistaken Out of date >> Nonunique Naming Assumption one resource may have more than one URI

11. New Information ? Open World Assumption