1.2 The Limits of the (current) Web

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1.2 The Limits of the (current) Web

  1. 1. This file is licensed under the Creative Commons Attribution-NonCommercial 3.0 (CC BY-NC 3.0)This file is licensed under the Creative Commons Attribution-NonCommercial 3.0 (CC BY-NC 3.0) Dr. Harald Sack Hasso-Plattner-Institut for IT Systems Engineering University of Potsdam Spring 2014 Knowledge Engineering with Semantic Web Technologies Lecture 1: Knowledge Engineering and the Web of Data 02: The Limits of the (current) Web
  2. 2. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam Lecture 1: Knowledge Engineering and the Web of Data 2 Open HPI - Course: Knowledge Engineering with Semantic Web Technologies
  3. 3. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 3 02: The Limits of the (current) Web ... OpenHPI - Course Knowledge Engineering with Semantic Web Technologies Lecture 1: Knowledge Engineering and the Web of Data
  4. 4. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 4 How can we find information in the Web?
  5. 5. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam current solution: 5
  6. 6. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 6 © http://semanticexchange.com/meta/ The Web is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. (...according to Douglas Adams)
  7. 7. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam The Web is really big... •ca. 25 x 109 indexed documents in search engines (TNL Blog: Google has 24 billion items index, considers MSN search nearest competitor, September 2005) •Web Crawler: > 1012 (1 trillion) documents (The Official Google Blog: We knew the Web was Big....., Juli 25, 2008 http://googleblog.blogspot.de/2008/07/we-knew-web-was-big.html ) •Google Search Index Caffeine comprises ca.100 Million Gigabytes i.e. 1017 Byte (SMX Video: Google’s Matt Cutts On Caffeine Launch, June 9, 2010, http://searchengineland.com/smx-video-googles-matt-cutts-on-caffeine-launch-43933) •DeepWeb (Darkweb) estimated to be about 550 times bigger than Surface Web 7
  8. 8. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 8 http://www.worldwidewebsize.com/
  9. 9. Dr. Harald Sack, Hasso-Plattner-Institut Potsdam, Workshop: Interaktion und Visualisierung im Datenweb (IVDW 2012), Braunschweig, 20.09.2012 ... and it‘s getting bigger by the minute!
  10. 10. Dr. Harald Sack, Hasso-Plattner-Institut Potsdam, Workshop: Interaktion und Visualisierung im Datenweb (IVDW 2012), Braunschweig, 20.09.2012http://blog.qmee.com/qmee-online-in-60-seconds/
  11. 11. Dr. Harald Sack, Hasso-Plattner-Institut Potsdam, Workshop: Interaktion und Visualisierung im Datenweb (IVDW 2012), Braunschweig, 20.09.2012http://blog.qmee.com/qmee-online-in-60-seconds/
  12. 12. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 11
  13. 13. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 11
  14. 14. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 12 From Data to Information in the WWW
  15. 15. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 From Data to Information in the WWW What is important and how do you know?
  16. 16. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 14 From Data to Information in the WWW What is news and what is advertisement?
  17. 17. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 15 From Data to Information in the WWW What information is related by content?
  18. 18. Lecture Semantic Web Technologies, Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 16 From Data to Information in the WWW What does the information mean?
  19. 19. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 17 From Data to Information in the WWW
  20. 20. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 18 Humans have contextual knowledge, world knowledge and experience to solve the problem
  21. 21. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 19 • The Web is based on the markup language HTML • HTML describes • how information is presented • how information is linked • but not, what the information means The Web is Supposed to be Used by Humans
  22. 22. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 20
  23. 23. Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam 21 GAME OVER Next section OpenHPI - Course Knowledge Engineering with Semantic Web Technologies Lecture 1: Knowledge Engineering and the Web of Data 03: The Importance of Meaning

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