A Close Look into
Social Semantic Web
--Presented by Juan Lin
Introduction
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What is Social Semantic Web
Social Semantic Web applications
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OntoWiki
SMOB
filmTrust – Review Websites
Future Issues
The Social Web
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Web 2.0 : web applications enables users to
interact and collaborate with each other,
providing power to end-users
Social Networking Sites
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Facebook : about 750 million users
LinkedIn : around 150 million users
YouTube : content-sharing sites
Current Issues with Social Web
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Lack of interoperability
Lack of efficient data exchange
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Reasons :
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1. individual service provider wants to bind
their customers
2. no common standards for all parties to
exchange information
When Social Web meets the
Semantic Web
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"The Semantic Web is not a separate Web
but an extension of the current one, in
which information is given well-defined
meaning, better enabling computers and
people to work in cooperation."
-- Tim Berners-Lee (2001)
FOAF
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Friend of a Friend (FOAF), aiming at
providing machine-readable contents that
can be shared without the implementation
of centralised databases
OWL and RDF are the foundation for FOAF
FOAF makes individual profiles from
different social web pages into one fully
detailed profile possible
FOAF
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foaf:name, foaf:surname and foaf:firstname are used to provide
information for person name properties.
foaf:phone is used to describe phone number for individuals
foaf:nick is used to describe user preferred nickname for
themselves
foaf:mbox can be used to provide Email address
foaf:depiction is for providing user profile image
foaf:homepage is the field for keeping the URL for person's
personal home page
foaf:gender is for keeping gender information.
foaf:knows is a field that can be used to describe a person that
current people object knows. It can be linked to another
foaf:person instance.
FOAF
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Foaf:knows has different kinds of usage;
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It can be used to describe two workers in the
same company, but not closed friends
Allow linking individuals by using foaf:person,
help generate RDF nodes to build up an
integrated social network graph
FOAF description is saved into files and kept
on the web servers, allowing public access
to these personal profiles
Semantic Wiki-- OntoWiki
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Wiki -- a type of websites, allowing users to
add, modify and delete the content via web
browsers; e. g. Wikipedia
Current Usage for Wikis: free dictionaries,
research projects/ papers
OntoWiki
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OntoWiki: help end users with simplification of
the presentation and acquisition of web data
It uses “information maps” as the knowledge
bases, where each node can be configured by
end users and linked to other resources.
It provides different ways to view information
for end users, e.g., list view, map view.
Assist social collaboration : changes tracking;
commenting ; rating
OntoWiki
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It also contributes to the development of
semantic search and it can be transformed to
be a search engine
OntoWiki Mobile is available and following the
HTML 5 standards, allowing users to edit and
access semantic information on-the-run.
Issue with OntoWiki: it is based on knowledge
engineering and it treats a single case as not
known or not definable.
Semantic Microblogging
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Microblogging – a simpler form of blogging,
such as Twitter, Sina Weibo
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It is sensitive to real-time news and events
It contains a huge amount of data that provided
by end users
Main drawback: posts are not related to any
semantic; related posts are really hard to be
integrated; hard to querying and reuse
information; # hashtags are not machinereadable
SMOB
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SMOB – Semantic MicrOBlogging ; an opensource framework ; LAMP ;
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Goal : provide a decentralised and distributed
platform for microblogs
Each microblog published via SMOB is
transformed into RDFa
It is built on distributed hubs, no need of
centralised server. Distributed hubs
communicate through SPARQL
SMOB ontologies stack
SMOB
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“Interlinking components” is introduced to
enable interlink microblog posts with the
Linking Open Date cloud.
It can suggest relevant URI for each term in #
hashtags automatically; can be used in the
future
Auto-completion: for geography location
information by integrating GeoNames ;
allowing users gather related location-based
information
Review Websites
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Review websites – online service websites
for individuals to post/comment/rank
particular products, services, etc.
Early review-enabled website: Amazon.com
FilmTrust : a web-based platform allows
registered users to read, rate and review
movies. The goal is to utilise trust rating
within the Social Web as the foundation of
calculating similaries.
FilmTrust
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Users can add other persons as friends, but can
be one-way action.
Users rank their friends as “how likely you
would see the film which is picked by this
friend”
“Recommended Rating” uses the inferred trust
values to compute with TidalTrust, to calculate
a weighted average rating for each movie.
It is an example of collaborative filtering
system
Future Issues for
the Social Semantic Web
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Privacy on the usage of Social Semantic Web
Personal authentication and authorization issue
How does individual authenticate themselves
across a linked data web
Related information disclosure
access control is a necessity to protect
individual’s privacy
Data Collection Issue
Semantic search might require record users’
activity history -- might violate users' privacy
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Future Issues cont.
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Effective semantic search on the Semantic
Web
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Information overload
Lack of information availability ( required data
not shown up to the querying users)
Navigation problem (feeling lost in hyperspace)
Ignorance of user diversity
How machine can understand the context of
“terms”, e.g. different meanings for “Beetle”
Conclusion
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Social Semantic Web will be playing an
important role in Web 3.0
We need to carefully balance the pros and
cons that Social Semantic Web brings up
References
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S.Auer, S. Dietzold and T. Riechaer , "OntoWiki- A Tool for Social Semantic Collaboration", 5th
International Semantic Web Conference, ISWC2006,
http://www.springerlink.com/content/e0081w7457683855/
J.Banford, A. McDiarmid, and J. Irvine," FOAF: improving detected social network accuray",
UbiComp (Adjunct Papers) 2010: 393-394. http://dl.acm.org/citation.cfm?id=1864453
J. Golbeck and M. Rothstein, "Linking Social Networks on the Web with FOAF: A Semantic Web
Case Study", AAAI Press, p. 1138-1143, 2008.
https://www.aaai.org/Papers/AAAI/2008/AAAI08-180.pdf
J. Hendler and T. Berners-Lee, ―From the Semantic Web to social machines: A research
challenge for AI on the World Wide Web", Artif. Intell., 174, (2), 156-161,2010.
http://www.stanford.edu/class/cs227/Readings/hendler-berners-lee-semantic-web.pdf
A. Passant, T. Hastrup, U. Bojars and J. Breslin, "Microblogging: A Semantic and Distributed
Approach", The 4th Workshop on Scripting for the Semantic Web (SFSW 2008) at the 5th
European Semantic Web Conference (ESWC '08), Tenerife, Spain, 2008.
http://aran.library.nuigalway.ie/xmlui/bitstream/handle/10379/539/11.pdf?sequence=1
Sami I Makelainen, "Social Semantic Web", in Proc. ECOC’00, 2000, paper 11.3.4, p. 109.
http://www.groundswell.fi/sim/academic/SocialSemanticWeb.pdf