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Freebase was a large collaborative knowledge base consisting of data composed mainly by its community members It was an online collection of structured data harvested from many sources, including individual, user-submitted wiki contributions Freebase aimed to create a global resource that allowed people and machines to access common information more effectively It was developed by the American software company Metaweb and ran publicly since March 2007 Metaweb was acquired by Google in a private sale announced 16 July 2010 Google's Knowledge Graph was powered in part by Freebase
Freebase data was available for commercial and non-commercial use under a Creative Commons Attribution License, and an open API, RDF endpoint, and a database dump was provided for programmers
On 16 December 2014, Knowledge Graph announced that it would shut down Freebase over the succeeding six months and help with the move of the data from Freebase to Wikidata
On 16 December 2015, Google officially announced the Knowledge Graph API, which is meant to be a replacement to the Freebase API Freebasecom was officially shut down on 2 May 2016
- 1 Overview
- 2 Development
- 3 Organization and policy
- 4 Discontinuation
- 5 See also
- 6 References
- 7 External links
On 3 March 2007 Metaweb announced Freebase, describing it as "an open shared database of the world's knowledge", and "a massive, collaboratively edited database of cross-linked data" Often understood as a database model using Wikipedia-turned-database or entity-relationship model, Freebase provided an interface that allowed non-programmers to fill in structured data, or metadata, of general information and to categorize or connect data items in meaningful, semantic ways
Described by Tim O'Reilly upon the launch, "Freebase is the bridge between the bottom up vision of Web 20 collective intelligence and the more structured world of the semantic web"
Freebase contained data harvested from sources such as Wikipedia, NNDB, Fashion Model Directory and MusicBrainz, as well as data contributed by its users The structured data was licensed under the Creative Commons Attribution License, and a JSON-based HTTP API was provided to programmers for developing applications on any platform to utilize the Freebase data The source code for the Metaweb application itself was proprietary
Freebase ran on a database infrastructure created in-house by Metaweb that used a graph model: Instead of using tables and keys to define data structures, Freebase defined its data structure as a set of nodes and a set of links that established relationships between the nodes Because its data structure was non-hierarchical, Freebase could model much more complex relationships between individual elements than a conventional database, and it was open for users to enter new objects and relationships into the underlying graph Queries to the database were made in Metaweb Query Language MQL and served by a triplestore called graphd
DevelopmentComputer expert Danny Hillis
Danny Hillis first described his idea for creating a knowledge web he called Aristotle in a paper in 2000, but he said he did not try to build the system until he had recruited two technical experts as co-founders Robert Cook, in parallel computing and database design, was Metaweb's executive vice president for product development John Giannandrea, formerly chief technologist at Tellme Networks and chief technologist of the Web browser group at Netscape/AOL, was chief technology officer
Originally accessible by invitation only, Freebase opened full anonymous read access to the public in its alpha stage of development and later required registration only for data contributions
On 29 October 2008, at the International Semantic Web Conference 2008, Freebase released its RDF service for generating RDF representations of Freebase topics, allowing Freebase to be used as linked data
Organization and policy
Freebase's subjects were called topics, and the data stored about them depended on their type, as to how they were classified For example, an entry for Arnold Schwarzenegger, the former governor of California, would be entered as a topic that would include a variety of types describing him as an actor, bodybuilder, and politician As of January 2014, Freebase has approximately 44 million topics and 24 billion facts
Freebase's types were themselves user-editable Each type had a number of defined predicates, called "properties"
nlike the W3C approach to the semantic web, which starts with controlled ontologies, Metaweb adopts a folksonomy approach, in which people can add new categories much like tags, in a messy sprawl of potentially overlapping assertions
In this manner, Freebase differed from the wiki model in many ways Users could create their own types, but these types were not adopted in the "public commons" until promoted by a Metaweb employee As well, users could not modify each other's types The reason Freebase could not open up permissions of schemas is that external applications relied on them; thus, changing a type's schema – for instance by deleting a property or changing a simple property – might have broken queries for API users and even within Freebase itself, in saved views, for example
On 16 December 2014, the Freebase team officially announced that the website and the application programming interface would be shut down by 30 June 2015 Google provided an update on 16 December 2015 that they will discontinue the Freebase API and widget 3 months after a Suggest widget replacement is launched in early 2016
- Entity–relationship model
- True Knowledge
- Knowledge Vault
- ^ "Freebase - Alexa" wwwalexacom Alexa Internet Retrieved 15 May 2014
- ^ Markoff, John 2007-03-09 "Start-up Aims for Database to Automate Web Searching" The New York Times Retrieved 2007-03-09
- ^ Menzel, Jack July 16, 2010 "Deeper Understanding with Metaweb" Google Official Blog Retrieved September 6, 2014
- ^ Singhal, Amit May 16, 2012 "Introducing the Knowledge Graph: Things, Not Strings" Google Official Blog Retrieved September 6, 2014
- ^ "Freebase" Google Plus 16 December 2014 Retrieved 16 December 2014
- ^ "So long and thanks for all the data!" 2 May 2016 Retrieved 5 May 2016
- ^ a b c d O'Reilly, Tim March 8, 2007 "Freebase Will Prove Addictive" O'Reilly Radar O'Reilly Media Archived from the original on October 14, 2008 Retrieved September 6, 2014
- ^ Meyer, Scott April 8, 2008 "A Brief Tour of Graphd" blogfreebasecom Archived from the original on May 30, 2012 Retrieved September 6, 2014
- ^ Hillis, W Daniel 2000 ""Aristotle" the Knowledge Web" Retrieved January 20, 2013
- ^ Markoff, John 2007-03-09 "Start-Up Aims for Database to Automate Web Searching" New York Times the New York Times Company Retrieved 2009-02-07
- ^ Taylor, Jamie October 30, 2008 "Introducing the Freebase RDF service" Archived from the original on May 16, 2012 Retrieved September 6, 2014
- ^ "Arnold Schwarzenegger" Freebase Retrieved 2014-02-14
- ^ "Explore Freebase Data" wwwfreebasecom Retrieved 2013-02-14
- ^ "Freebase blog" Google Knowledge Graph Team 16 December 2014 Retrieved 16 December 2014
|Wikidata has the property: Freebase identifiers P646 see uses|
|Wikimedia Commons has media related to Freebase|
- Official website
- List of Experts
- WikiProject Freebase in Wikidata,
the forum for managing the migration of Freebase content into Wikidata
- Freebase data dumps at Google Developers
- Geographic Knowledge in Freebase, Oxford Internet Institute
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