Semantic Web    Marilyn Pontius and Debi RatliffIS 535 Advanced Information Retrieval        Final Project Fall 2011
Development of theSemantic Web                                                                   Web 3.0                  ...
Metadata            Karen Coyle,           “Understanding the           Semantic Web:           Bibliographic Data and    ...
Metadata      Karen Coyle, “Understanding the Semantic      Web: Bibliographic Data and Metadata”.      ALA TechSource.2010.
Implications for  Information Retrieval• The web we know: documents  are linked based on syntactic  structure using HTML; ...
• The web we know: human  searches, human decides  what’s relevant, retrieved results  often irrelevant• Semantic Web: mac...
Web publishing now: propensity for production; overload of information is disorganized and inaccessibleSemantic Web: linke...
• The web we know: data across  systems is not inter-changeable;  metadata schema in differing  databases preclude retriev...
• The web we know: Web 2.0  mashups use fixed sets of data• Semantic Web: will use  unbound, global data
Ontology• Unlike a taxonomy, has “open”  vocabulary in which the creator  of the subject description  language is allowed ...
RDF• In order to share and reuse information  between disparate systems, data must be  in the same or similar format or la...
XML• The base on which semantic technologies  operate• Like HTML, XML has strict syntax rules so  that a computer can read...
Web Ontology    Language (OWL)• OWL links together triples from  disparate sources and meshes  them with each other• Resul...
Semantic Web        Readiness     LibrariesText based MARC                  World Wide Web / Semantic Web                 ...
Libraries and theSemantic Web• FRBR  Work, Expression, Manifestation, Item• RDA  Cataloging rules aligned with FRBR• LOC S...
Semantic Web   What‘s possible for   LibrariesProviding service where the customers are:   Lincoln        Customer is read...
Examples on the Web•   Friend of a Friend (FOAF) http://www.foaf-project.org/    Data on different social network sites ar...
THE NEXT WEBhttp://www.ted.com/index.php/talks/tim_berners_lee_on_the_next_web.html
Upcoming SlideShare
Loading in …5
×

Semantic Web (IS 535 presentation) by ITRL students Deborah Ratliff and Marilyn Pontius

545 views

Published on

Created and presented by ITRL students Deborah Ratliff and Marilyn Pontius.

Published in: Education
  • Be the first to comment

  • Be the first to like this

Semantic Web (IS 535 presentation) by ITRL students Deborah Ratliff and Marilyn Pontius

  1. 1. Semantic Web Marilyn Pontius and Debi RatliffIS 535 Advanced Information Retrieval Final Project Fall 2011
  2. 2. Development of theSemantic Web Web 3.0 Web 2.0 • WWW database • Linked data • Social networks • Web page Web 1.0 • Blogs and wikis content from • Tagging many places • HTTP • Web pages • Intelligent • Static HTML web dynamic and personal agents pages interactive Desktop • Databases Computing • File servers • Modems • NetworkingPacket EquipmentSwitching• TCP/IP• Email• FTP
  3. 3. Metadata Karen Coyle, “Understanding the Semantic Web: Bibliographic Data and Metadata”. ALA TechSource.2010.
  4. 4. Metadata Karen Coyle, “Understanding the Semantic Web: Bibliographic Data and Metadata”. ALA TechSource.2010.
  5. 5. Implications for Information Retrieval• The web we know: documents are linked based on syntactic structure using HTML; hypertext is coded with location for linked document• Semantic Web: data is linked based on meaning using XML, RDF, URIs, and ontologies
  6. 6. • The web we know: human searches, human decides what’s relevant, retrieved results often irrelevant• Semantic Web: machine readable data searchable by “agents”, retrieves precise, relevant results due to ontology, URI, and RDF
  7. 7. Web publishing now: propensity for production; overload of information is disorganized and inaccessibleSemantic Web: linked data will result in more efficient, automated searching; more reuse of information
  8. 8. • The web we know: data across systems is not inter-changeable; metadata schema in differing databases preclude retrieval from outside systems• Semantic Web: data retrieved based on meaning, not structure or syntax; data accessible across applications
  9. 9. • The web we know: Web 2.0 mashups use fixed sets of data• Semantic Web: will use unbound, global data
  10. 10. Ontology• Unlike a taxonomy, has “open” vocabulary in which the creator of the subject description language is allowed to define the language at will(Garshol, 2004, p 384).• Flexibility allows expression and description of relationships between objects
  11. 11. RDF• In order to share and reuse information between disparate systems, data must be in the same or similar format or language• RDF breaks each piece of data down into a simple three-part statement called a triple. Each triple has a subject, predicate and object which is assigned a Unique Resource Identifier (URI)• This simple structure allows different computer applications to read and relate each triple with other data• Example: Melville wrote Moby Dick (subject) (predicate) (object)
  12. 12. XML• The base on which semantic technologies operate• Like HTML, XML has strict syntax rules so that a computer can read and process it easily and reliably• RDF & XML allows interoperability
  13. 13. Web Ontology Language (OWL)• OWL links together triples from disparate sources and meshes them with each other• Results in linked data that can provide new meaning• Reuse of data is possible
  14. 14. Semantic Web Readiness LibrariesText based MARC World Wide Web / Semantic Web Unicode, XML
  15. 15. Libraries and theSemantic Web• FRBR Work, Expression, Manifestation, Item• RDA Cataloging rules aligned with FRBR• LOC Subject Authorities
  16. 16. Semantic Web What‘s possible for LibrariesProviding service where the customers are: Lincoln Customer is reading an essay about Lincoln. Clicks on Lincoln, and a list of books about Lincoln in their local library is displayed. Shows what is on the shelf and available, and a hold is placed (Coyle). Global Warming Student enters phrase to search. Multimedia report returned gathered from validated sites across the web, including library information (Ohler).
  17. 17. Examples on the Web• Friend of a Friend (FOAF) http://www.foaf-project.org/ Data on different social network sites are linked together.• Dbpedia http://wiki.dbpedia.org/OnlineAccess W3C project to extract structured data from Wikipedia articles (data in graphs, side tables, etc), make it available on the web, and link it to other datasets.• Hakia http://www.hakia.com/ semantic search engine, includes New Pub Med with a comparison of Hakia semantic search of Pub Med to keyword indexed search of same content. MoodTRADE (financial). Aerohakia (aerospace industry)• SIMILI http://simile.mit.edu/ MIT libraries and MIT Computer Science Artificial Intelligence Lab.
  18. 18. THE NEXT WEBhttp://www.ted.com/index.php/talks/tim_berners_lee_on_the_next_web.html

×