This file is licensed under the Creative Commons Attribution-NonCommercial 3.0 (CC BY-NC 3.0)This file is licensed under the...
Semantic Web Technologies , Dr. Harald Sack, Hasso Plattner Institute, University of Potsdam
Lecture 1: Knowledge Engineer...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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OpenHPI - Course Knowledge Eng...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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From the World Wide Web to the...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Tim Berners-Lee, Semantic Web ...
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Precondition:
• Content can be...
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Semantic Web
• Natural languag...
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“Understanding“ Content on the...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Text: „Heisenberg can wait?“
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•Disambiguation
solution of l...
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• The Meaning (Semantics) of ...
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• The Meaning (Semantics) of ...
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• The Meaning (Semantics) of ...
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Walter White (entity)
Fiction...
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Walter White
•The Meaning (Se...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Walter White
•The Meaning (Se...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Walter White
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Walter White
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Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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Walter White
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Tim Berners-Lee, James Hendle...
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•The Meaning of Information (...
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Das Semantic Web
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Semantic W...
Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
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1.5 The Web becomes intelligent

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1.5 The Web becomes intelligent

  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 05: The Web becomes Intelligent
  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-Institut, Universität Potsdam 3 OpenHPI - Course Knowledge Engineering with Semantic Web Technologies Lecture 1: Knowledge Engineering and the Web of Data 05: The Web becomes Intelligent
  4. 4. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 4 From the World Wide Web to the Web of Data • The Web of Data is an upgrade of the Web of Documents • The Web as a huge decentralised database (knowledge base) of • machine-accessible data „The web of human-readable document is being merged with a web of machine understandable data. The potential of the mixture of humans and machines working together and communication through the web could be immense.“ Tim Berners-Lee, The World Wide Web: A very short personal history, May 1998
  5. 5. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 5 Tim Berners-Lee, Semantic Web Roadmap, Sept 1998 „The Web was designed as an information space, with the goal that it should be useful not only for human-human communication, but also that machines would be able to participate and help… “ From the World Wide Web to the Web of Data
  6. 6. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 6 Precondition: • Content can be read and interpreted correctly (= „understood“) by machines Natural Language Processing • Technologies of traditional Information Retrieval (Search Engines) From the World Wide Web to the Web of Data
  7. 7. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 7 Semantic Web • Natural language web content will be explicitly annotated with semantic metadata • Semantic metadata encode the Meaning (Semantics) of the content and can be read and interpreted correctly by machines Precondition: • Content can be read and interpreted correctly (= „understood“) by machines Natural Language Processing • Technologies of traditional Information Retrieval (Search Engines) From the World Wide Web to the Web of Data
  8. 8. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  9. 9. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 9 “Understanding“ Content on the Web Photo via twitter/@Edelman11
  10. 10. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation “Understanding“ Content on the Web
  11. 11. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web
  12. 12. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web a physicistJochen Heisenberg ?
  13. 13. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web a physicistJochen Heisenberg ? a neurobiologistMartin Heisenberg ?
  14. 14. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web a physicistJochen Heisenberg ? a neurobiologistMartin Heisenberg ? a physicist and Nobel Laureate Werner Heisenberg ?
  15. 15. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web a physicistJochen Heisenberg ? a neurobiologistMartin Heisenberg ? a physicist and Nobel Laureate Werner Heisenberg ? lead character of Breaking Bad Walter White
  16. 16. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 10 •Disambiguation solution of linguistic ambiguities Text: „Heisenberg can wait?“ Entity Mapping Disambiguation Benjamin Heisenberg ? a film director “Understanding“ Content on the Web a physicistJochen Heisenberg ? a neurobiologistMartin Heisenberg ? a physicist and Nobel Laureate Werner Heisenberg ? lead character of Breaking Bad Walter White
  17. 17. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 11 • The Meaning (Semantics) of entities and classes must be defined explicitly. Walter White Entity Text: „Heisenberg can wait?“ “Understanding“ Content on the Web
  18. 18. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 11 • The Meaning (Semantics) of entities and classes must be defined explicitly. Walter White Entity Fictional Character is a Class Text: „Heisenberg can wait?“ “Understanding“ Content on the Web
  19. 19. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 11 • The Meaning (Semantics) of entities and classes must be defined explicitly. Walter White Entity Fictional Character is a Class Person is subclass of Class Text: „Heisenberg can wait?“ “Understanding“ Content on the Web
  20. 20. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 12 Walter White (entity) Fictional Character is a (class) Class- membership has class •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) “Understanding“ Content on the Web
  21. 21. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 12 Walter White (entity) Fictional Character is a (class) Class- membership has class Person is subclass of (class) superclass subclass is subclass of •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) “Understanding“ Content on the Web
  22. 22. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) “Understanding“ Content on the Web
  23. 23. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Character are subclasses of Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) “Understanding“ Content on the Web
  24. 24. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Character are subclasses of Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) Person is subclass of “Understanding“ Content on the Web
  25. 25. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Character are subclasses of Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) is a Person is subclass of “Understanding“ Content on the Web
  26. 26. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Character are subclasses of Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) is a Person is subclass of is a “Understanding“ Content on the Web
  27. 27. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 13 Walter White •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) is a Fictional Schoolteacher Fictional Character are subclasses of Fictional Scientist Fictional Drug Dealer Fictional Gangster Fictional Character from New Mexico (more classes) is a Person is subclass of is a logical Inference “Understanding“ Content on the Web
  28. 28. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 14 Walter White is a •The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) (properties) Person mother Person domain range (classes) (classes) father Person domain range Person birthPlace Location domain range Person birthDate Date/Time domain range Person “Understanding“ Content on the Web
  29. 29. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 15 Tim Berners-Lee, James Hendler, Ora Lassila: The Semantic Web, Scientific American, 284(5), pp. 34-43(2001) What is the Semantic Web? „The Semantic Web is an extension of the current web in which information is given well-defined meaning, better enabling computers and people to work in cooperation"
  30. 30. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 16 •The Meaning of Information (Semantics) is made explicit by formal (structured) and standardized knowledge representations (Ontologies). • Thus it will be possible, •to process the meaning of information automatically •to relate and integrate heterogeneous data •to deduce implicite (not evident) information from existing (evident) information in an automated way The Semantic Web is kind of a global database that contains a universal network of semantic propositions. The Semantic Web - a Web of Data
  31. 31. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 17 Das Semantic Web • Semantic Web ...towards an „intelligent“ Web
  32. 32. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam 18 Next section OpenHPI - Course Knowledge Engineering with Semantic Web Technologies Lecture 1: Knowledge Engineering and the Web of Data 06: The Web becomes Intelligent Pt.2
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