Freebase, RDF and the Semantic Web
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

Freebase, RDF and the Semantic Web

  • 12,105 views
Uploaded on

A presentation to the SF Semantic Web Meet-up (5/14/09) describing Freebase and its connection to RDF, Linked Data and the Semantic Web.

A presentation to the SF Semantic Web Meet-up (5/14/09) describing Freebase and its connection to RDF, Linked Data and the Semantic Web.

More in: Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
12,105
On Slideshare
11,545
From Embeds
560
Number of Embeds
13

Actions

Shares
Downloads
327
Comments
0
Likes
21

Embeds 560

http://www.marketing-internet-montreal.com 436
http://blog.freebase.com 61
http://www.slideshare.net 33
http://www.mozalami.com 11
http://paper.li 5
http://mozalami.panosouk.com 4
http://feeds.feedburner.com 3
http://translate.googleusercontent.com 2
http://red.gnoss.com 1
http://linkeddata.uriburner.com 1
http://roblog.freebase.com 1
http://127.0.0.1:8795 1
http://www.slideee.com 1

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. A socially managed semantic database SF Semantic Web Meet-up May 2009 Colin Evans + Jamie Taylor
  • 2. A Brief History of Data Modeling Photo CC-BY: http://en.wikipedia.org/wiki/File:McDonalds_on_Interstate_44.jpg
  • 3. Ugly Tabular Data
  • 4. A Simple Restaurant Schema
  • 5. A Simple Restaurant Schema
  • 6. A Big, Ugly Schema
  • 7. What Went Wrong? • Things change • Requirements change • User expectations change • Data structures change • Our data models aren’t keeping up
  • 8. Using Graphs to Model Data
  • 9. Metadata is Data • Relationships are represented explicitly • Schema can be represented as a graph • Data integration is the union of two graphs • This makes creating, extending, and combining data much easier than before
  • 10. Data Integration B B A A C C D E E F
  • 11. Why Does This Work? • Semantics facilitate shared meaning through • Subject Identity • Strong and Consistent Semantics • Open APIS + Open Data • These principles make it much easier to extend, combine, and integrate data
  • 12. What is Freebase? • Structured Database • Strong Collaboratively Edited Subjects • Strong Collaboratively Developed Semantics • Open API + Open Data
  • 13. Freebase is a database of things.
  • 14. 5,203,825 Topics 14,110,006 Named Entities
  • 15. Users can write to Freebase + add entities + add properties + create data models!
  • 16. All objects in Freebase have strong identifiers!
  • 17. NYSE: BA TYO: 7661 /en/boeing /guid/9202a8c04000641f8000000000009d0e /business/cik/0000012927 /wikipedia/en_id/3709 /wikipedia/en/Boeing
  • 18. http://blog.kiwitobes.com/?p=57
  • 19. Topics in Freebase are Unique (no two Topics represent the same thing)
  • 20. Once you access an object in Freebase you have access to all facets of information Po litic al s C ter on ar trib qu d de uti ad n ou on He SIC F ate s Co D de co me era ting In CIK Code Op Boeing Marke ol t Capit r Symb alizatio Ticke n CE ies O iar red ured sid b Su ctu t ufac ufa an Man ft M cra kets Air Roc
  • 21. What are people doing with the results?
  • 22. Microsoft Political Blog
  • 23. What else can you do with Freebase?
  • 24. Use Freebase to publish into the LOD Cloud
  • 25. http://rdf.freebase.com/ns/en.terri_brosius <fb:people.sibling_relationship rdf:about=quot;http://rdf.freebase.com/ns/guid.9202a8c04000641f8000000004598a74quot;> <fb:people.sibling_relationship.sibling rdf:resource=quot;http://rdf.freebase.com/ns/en.carlene_barousquot;/> <fb:people.sibling_relationship.sibling rdf:resource=quot;http://rdf.freebase.com/ns/en.terri_brosiusquot;/> </fb:people.sibling_relationship>
  • 26. RDFa
  • 27. An example of an RDFa Restaurant Review <span xmlns:v=quot;http://rdf.data-vocabulary.org/quot; typeof=quot;v:Reviewquot;> <span rel=quot;v:itemReviewedquot;> <span about=quot;http://komalavilas.comquot; property=quot;v:namequot; typeof=quot;v:Restaurantquot;>Komala Vilas</span> </span> <span rel=quot;v:reviewerquot;> <span about=quot;http://rdf.freebase.com/ns/en.s_meenakshi_ammalquot; property=quot;v:namequot;>Meenakshi Ammal</span> </span> <span property=quot;v:ratingquot; >3.7</span> <span property=quot;v:datequot;>1st April 2005</span> <span property=quot;v:summaryquot;> Best south Indian vegetarian food in the bay area</span> </span>
  • 28. 5,203,825 Topics 14,110,006 Named Entities
  • 29. Freebase Suggest http://code.google.com/p/freebase-suggest/
  • 30. ACRE: The Freebase Javascript Development Environment
  • 31. The Acre application environment
  • 32. A source of Vocabularies
  • 33. Freebase is a database of types. A source of Vocabularies
  • 34. public domain photo: http://en.wikipedia.org/wiki/File:SwissReHQ.jpg
  • 35. photo by Jamie
  • 36. Can’t find a vocabulary you need? Write your own!
  • 37. sameas.freebase.com
  • 38. sameas.freebase.com GovTrack 0000051143 /en/ibm CIK
  • 39. MQL: Metaweb Query Language Query: { “id”:”/en/ibm”, “type”:”/business/company”, “founded”:null } July 15, 1916
  • 40. MQL Extensions + sameAs Map Query: { “id”:”/en/ibm”, “type”:”/business/company”, “lod”:[{ }] }