Deepak semantic web_iitd

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Deepak semantic web_iitd

  1. 1. Hacking  with  Seman/c  Web   Deepak  Shevani   Developer  @  Yahoo!  
  2. 2. What’s  in  here?   •  Evolu/on  of  the  web   •  Poorly  Solved  Informa/on  Needs   •  Seman/c  Web  Technologies   •  Linked  Data   •  GeIng  Structured  Informa/on  from  Web.  
  3. 3. Few  Content  Creators!    Majority  Consumers!   WEB  1.0     hKp://www.flickr.com/photos/leandrociuffo/3665883373/  
  4. 4. WEB  2.0     Web  as  a  pla7orm   hKp://www.flickr.com/photos/lambertwm/4737580179/  
  5. 5. Ofoto   Flickr   Personal  Website   Blogging   Britannica  Online   Wikipedia   Directories(taxonomy)   Tagging(“folksonomy”)   Content  Management   Systems   Wikis   WEB  1.0    vs    WEB  2.0    
  6. 6. WEB  3.0     hKp://www.flickr.com/photos/markhillary/337685031   Which  direc/on  will  it  take?  
  7. 7. Seman/c  Web   Pervasive  Web   Ar/ficial   Intelligence   Personaliza/on   Virtual  Web   WEB  3.0     Could  be  anything!  
  8. 8. Tim  Berners  Lee  –  Inventor  of  the  WWW   Web   was   designed   as   an   informaCon   space,  for  humans  as  well  as  machines.   The   informaCon   on   web   must   be   explicit  for  machines,  so  that  they  take   part   in   reasoning   and   solving   human   problems  -­‐  TBL  
  9. 9. A  Web  of  Documents  rather  than  Data!   Today’s  Web  
  10. 10. Poorly  Solved  Informa/on  Needs   •  Multiple interpretations –  Apple •  Long tail queries –  Roja (I meant a south indian actress) •  Imprecise or overly precise searches –  Brad Pitt –  pictures of strong adventures people •  Searches for descriptions –  countries in Africa –  25 year old computer engineer living in Bangalore –  Reliable smart phone under 15,000 rupees
  11. 11. THE  SOLUTION   Seman/c  Web  
  12. 12. Publish  data  on  the  Web   •  Linked  Data:  linking  data  similar  to  how  we  link   documents  on  the  Web   •  Query  databases  over  the  Web  
  13. 13. Architectural  Challenges   •  A  common  format  for  sharing  data   •  Sharing  the  meaning  of  data   •  Infrastructure  
  14. 14. Current  Researches  &  Other  Efforts   •  Seman/c  Web  research  into  knowledge   representa/on  and  reasoning,  data   integra/on,  data  quality  and  many  other   topics   •  Community  effort  (Linked  Data  movement)  
  15. 15. Linked  Data  cloud:  interlinked  RDF   datasets  on  the  Web   hKp://linkeddata.org/  
  16. 16. DBPedia   •  Dbpedia  is  dataset  that  contains  much  of  the   structured  data  in  Wikipedia   – Data  from  the  info-­‐boxes   – Links  between  Wikipedia  pages   – Categories   – Disambigua/on  and  redirect  pages   •  Links  to  other  datasets  
  17. 17. Fetching  individual  resources   •  Use  your  web  browser   •  hKp://dbpedia.org/resource/Yahoo  redirects  to   hKp://dbpedia.org/page/Yahoo     •  You  can  plug  in  this  URI  into  other  Linked  Data  browsers   •  HTTP  GET  to  fetch  data   –  Using  curl:  add  Accept:  applicaCon/rdf+xml  for  RDF   and  enable  redirect   •  curl  -­‐L  -­‐H  'Accept:applica/on/rdf+xml'  'hKp://dbpedia.org/ resource/Berlin’   •  Data  dumps   –  hKp://wiki.dbpedia.org/Datasets  
  18. 18. References   •  hKp://www.slideshare.net/tompraison   •  hKp://inkdroid.org/journal/2010/06/04/ the-­‐5-­‐stars-­‐of-­‐open-­‐linked-­‐data/   •  hKp://www.freebase.com/   •  hKp://dbpedia.org/About    
  19. 19. Thank  you  J  

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