Advogato

Infobox Website
name = Advogato



caption =
url = [http://www.advogato.org// www.Advogato.org]
commercial =
type = community site and social network site for free software developers
language =
registration =
owner =
author = Raph Levien
launch date = 1999
current status = active
revenue =
slogan =
alexa =

Advogato is an online community site dedicated to free software development, created by Raph Levien. It describes itself as "the free software developer's advocate." Advogato was an early pioneer of "online diaries", which later became known as blogs, and one of the earliest social networking websites. Advogato combined the most recent entries from each user's diary together into a single continuous feed called the [http://www.advogato.org/recentlog.html recentlog] . This directly inspired the creation of the Planet aggregator somewhat later.

Many high profile members of the free software and open source software movements are or have been users of the site including [http://advogato.org/person/rms/ Richard M. Stallman] , [http://www.advogato.org/person/esr/ Eric Raymond] , [http://advogato.org/person/alan Alan Cox] , [http://www.advogato.org/person/BrucePerens/ Bruce Perens] , [http://www.advogato.org/person/jwz/ Jamie Zawinski] and others.

Because Advogato was the first website to use a robust, attack-resistant trust metric and to release the underlying code for that trust mechanism under a free software license, it has been the basis of numerous research papers on trust metrics and social networking (see the list below for specific examples). Advogato's early adoption of an XML-RPC interface lead to its use as an example of how such interfaces could be used by web programmers in the book Teach Yourself Programming with Java in 24 Hours by Rogers Cadenhead [Cadenhead, Rogers, Teach Yourself Programming with Java in 24 Hours, Sams, 2005] .

Advogato is still used as a testbed for social networking and semantic web technologies. Tim Berners-Lee, [http://advogato.org/person/timbl/ who is an Advogato user himself] , included Advogato in a short list of sites that should be noted for their early adoption of the FOAF as a method of exporting user RDF URIs. [ [http://blogs.zdnet.com/BTL/?p=7126 Tim Berners-Lee: From World Wide Web to Giant Global Graph] ]

Trust metric

The motivating idea for Advogato was to try out in practice Levien's ideas about attack resistant trust metrics, having users certify each other in a kind of peer review process and use this information to avoid the abuses that plague open community sites. Levien observed that his notion of attack resistant trust metric was fundamentally very similar to the PageRank algorithm used by Google to rate article interest. In the case of Advogato, the trust metric is designed to include all individuals who could reasonably be considered members of the Free Software and Open Source communities while excluding others.

The implementation of this trust metric is through an Apache module called "mod virgule" [http://www.advogato.org/proj/mod_virgule/] . "mod_virgule" is free software, licensed under the GPL and written in C. It is used by several websites other than Advogato.

Misunderstanding of the purpose of Advogato's trust metric is common, often leading to assumptions that it should exclude specific individuals on the basis that they are viewed as "cranks" by most members of the community. [ [http://www.advogato.org/article/928.html Advogato: Advogato Has Failed ] ] .

There is a wiki, called "AdvoWiki" (see below), that applies Levien's theory to sort wiki pages by interest level.

See also

*Everything2
*Kuro5hin
*Slashdot

References

External links

* [http://www.advogato.org/ Official Site]
* [http://www.advogato.org/faq.html Advogato FAQ]
*http://perldesignpatterns.com/?AdvoWiki -- AdvoWiki site
*http://advogato.org/proj/mod_virgule/ -- mod_virgule project page
* Rusty Foster, 2004. ' [http://www.kuro5hin.org/story/2004/3/24/0502/96199 User Sponsorship and Managed Growth] '. Kuro5hin article.

Advogato and mod_virgule refences

*Raph Levien (2004). [http://www.levien.com/thesis/compact.pdf Attack Resistant Trust Metrics] . Early draft of abandoned PhD manuscript.
*Raph Levien (2007). Lessons From Advogato [http://video.google.com/videoplay?docid=-5092930485716426869 (video)] [http://video.vanhecke.info/lessons-from-advogato-on-reputation-systems/ (abstract)] . Google Tech Talks, June 25, 2007.
*Jesse Ruderman (2004). [http://www.squarefree.com/trust/trust.pdf A comparison of two trust metrics] .
*Mary Tyler (2004). [http://www.linux.com/feature/36497 Behind four Linux community sites] . Linux.com feature.
* [http://archive.salon.com/tech/feature/2000/07/18/advogato/index.html Even better than Slashdot, Salon.com]
* [http://opensource.mit.edu/papers/stewart1.pdf Social Forces and Constraint in the Attainment of Community Status]