OpenHPI 1.5 - The Vision of the Semantic Web

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Free online Lecture "Semantic Web Technologies" at OpenHPI. Visit the Course website, registration is free. You will find the lecture recordings as mp3 and also as video at https://openhpi.de/course/semanticweb

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OpenHPI 1.5 - The Vision of the Semantic Web

  1. 1. Semantic Web Technologies Lecture 1: The Web of Data 05: The Vision of the Semantic Web Dr. Harald Sack Hasso Plattner Institute for IT Systems Engineering University of Potsdam Spring 2013This file is licensed under the Creative Commons Attribution-NonCommercial 3.0 (CC BY-NC 3.0)
  2. 2. 2 Lecture 1: The Web of Data Open HPI - Course: Semantic Web Technologies Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  3. 3. 3 05: The Vision of the Semantic Web OpenHPI - Course Semantic Web Technologies - Lecture 1: The Web of Data Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  4. 4. From the World Wide Web to the Web of Data4 „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… “ Tim Berners-Lee, Semantic Web Roadmap, Sept 1998 Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  5. 5. From the World Wide Web to the Web of Data5 Precondition: • Content can be read and interpreted correctly (= „understood“) by machines Natural Language Processing • Technologies of traditional Information Retrieval (Search Engines) Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  6. 6. From the World Wide Web to the Web of Data6 Precondition: • Content can be read and interpreted correctly (= „understod“) by machines Natural Language Processing Semantic Web • Technologies of traditional • Natural language web content will Information Retrieval be explicitly annotated with (Search Engines) semantic metadata • Semantic metadata encode the Meaning (Semantics) of the content and can be read and interpreted correctly by machines Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  7. 7. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  8. 8. „Understanding“ Content on the Web8 Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  9. 9. „Understanding“ Content on the Web9 Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  10. 10. „Understanding“ Content on the Web9 Text: „Why snub me, Fab?“ Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  11. 11. „Understanding“ Content on the Web9 Text: „Why snub me, Fab?“ • Disambiguation solution of linguistic ambiguities Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  12. 12. „Understanding“ Content on the Web9 Text: „Why snub me, Fab?“ Entity Mapping Disambiguation Fab ? a detergent Fab ? a Canadian gay magazine FAB ? the Film Advisory Board FAB ? Federación Atlética de Bolivia Brazilian Basketball • Disambiguation Fab Melo ? Player solution of linguistic ambiguities Fabrizio Moretti ? Drummer of The Strokes Fabio Capello ? Manager of the UK national Football team Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  13. 13. „Understanding“ Content on the Web10 Text: „Why snub me, Fab?“ Entity Mapping Fabio Capello Entity • The Meaning (Semantics) of entities and classes must be defined explicitly. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  14. 14. „Understanding“ Content on the Web10 Text: „Why snub me, Fab?“ Entity Mapping Fabio Capello Entity is a Soccer Manager Class • The Meaning (Semantics) of entities and classes must be defined explicitly. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  15. 15. „Understanding“ Content on the Web10 Text: „Why snub me, Fab?“ Entity Mapping Fabio Capello Entity is a Soccer Manager Class is subclass of • The Meaning (Semantics) of entities and classes must be defined explicitly. Person Class Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  16. 16. „Understanding“ Content on the Web11 • The Meaning (Semantics) is expressed with the help of appropriate knowledge representations (Ontologies) Fabio Capello (entity) Class- is a membership has class Soccer Manager (class) Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  17. 17. „Understanding“ Content on the Web11 • The Meaning (Semantics) is expressed with the help of appropriate knowledge representations (Ontologies) Fabio Capello (entity) Class- is a membership has class Soccer Manager (class) subclass is subclass of is subclass of superclass Person (class) Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  18. 18. „Understanding“ Content on the Web (III)12 • The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) Fabio Capello Entities is a Classes Soccer Manager is subclass of Person Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  19. 19. „Understanding“ Content on the Web (III)12 • The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) Fabio Capello Entities is a Classes Soccer Manager is subclass of Person Place birthPlace Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  20. 20. „Understanding“ Content on the Web (III)12 • The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) Fabio Capello San Canzian birthPlace Entities is a Classes Soccer Manager is a is subclass of Person Place birthPlace Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  21. 21. „Understanding“ Content on the Web (III)12 • The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) Fabio Capello San Canzian birthPlace Entities is a Classes Soccer Manager is a is subclass of Date Person Place birthDate birthPlace Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  22. 22. „Understanding“ Content on the Web (III)12 • The Meaning (Semantics) is expressed with the help of well suited knowledge representations (Ontologies) 1946-06-18 Fabio Capello San Canzian birthDate birthPlace Entities is a Classes Soccer Manager is a is a is subclass of Date Person Place birthDate birthPlace Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  23. 23. What is the Semantic Web?13 „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" Tim Berners-Lee, James Hendler, Ora Lassila: The Semantic Web, Scientific American, 284(5), pp. 34-43(2001) Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  24. 24. The Semantic Web - a Web of Data14 •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. Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  25. 25. Semantic Web ...towards an „intelligent“ Web15 Das Semantic Web • Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam
  26. 26. Next sect ion16 06: The Vision of the Semantic Web Pt.2 OpenHPI - Course Semantic Web Technologies - Lecture 1: The Web of Data Semantic Web Technologies , Dr. Harald Sack, Hasso-Plattner-Institut, Universität Potsdam

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