Freebase, RDF and the Semantic Web

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Freebase, RDF and the Semantic Web - Presentation Transcript

A socially managed semantic database SF Semantic Web Meet-up May 2009 Colin Evans + Jamie Taylor

A Brief History of Data Modeling Photo CC-BY: http://en.wikipedia.org/wiki/File:McDonalds_on_Interstate_44.jpg

Ugly Tabular Data

A Simple Restaurant Schema

A Simple Restaurant Schema

A Big, Ugly Schema

What Went Wrong? • Things change • Requirements change • User expectations change • Data structures change • Our data models aren’t keeping up

Using Graphs to Model Data

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

Data Integration B B A A C C D E E F

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

What is Freebase? • Structured Database • Strong Collaboratively Edited Subjects • Strong Collaboratively Developed Semantics • Open API + Open Data

Freebase is a database of things.

5,203,825 Topics 14,110,006 Named Entities

Users can write to Freebase + add entities + add properties + create data models!

All objects in Freebase have strong identifiers!

NYSE: BA TYO: 7661 /en/boeing /guid/9202a8c04000641f8000000000009d0e /business/cik/0000012927 /wikipedia/en_id/3709 /wikipedia/en/Boeing

http://blog.kiwitobes.com/?p=57

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http://www.slideshare.net/jamietaylor/freebase-rdf-and-the-semantic-web-1455414

http://www.slideshare.net/jamietaylor/freebase-rdf-and-the-semantic-web-1455414