FOAF for Social Network Portability

FOAF for Social Network Portability Uldis Bojars (captsolo@gmail.com) WebCamp on Social Network Portability Cork, Ireland - March 2, 2008

Introduction Uldis Bojārs @ DERI Galway • FOAF - topic of this talk • SIOC - what I am working on

http://en.wikipedia.org/wiki/Linked_Data

Friend of a Friend Information about: • Person • Social Network / Relations • Groups

Friend of a Friend Information about: • Person • Social Network / Relations • Groups (multiple) • ... and more ...

Richer Info Needed? • RDF allows us to combine FOAF with other vocabularies • XFN, Relations vocabulary, ...

Richer Info Needed? • RDF allows us to combine FOAF with other vocabularies • XFN, Relations vocabulary, ... RDF = Information, Concentrated

Richer Info Needed? • An example - Morten’s FOAF proﬁle: http://www.wasab.dk/morten/blog/archives/author/mortenf/

Social Network Portability Components (data): • A way to identify a person (across sites) - privacy • A way to describe a social network - relations between people

Identifying Properties • E-Mail address (private) • Hash of e-mail (semi-public) • URLs (public) • ...

Social Network Portability Components (tools): • Tools / Services (do the actual “magic”) • Data providers - opening up social media sites • Data users / consumers

Workﬂow 1. Parse FOAF data (from Site A) 2. Extract a list of friends and some data for identifying them 3. Compare this identifying data with a registry of users on Site B, report matching users

Parsing FOAF data? Python: import RDF # using Redland Python bindings (librdf.org) m = RDF.Model() m.load('http://danbri.org/foaf.rdf')

Finding Friends? :) SPARQL: SELECT ?person ?mbox WHERE { <danbri> foaf:knows ?person . ?person foaf:mbox ?mbox . }

Case Study: LiveJournal • Data about a person (FOAF) - ✓ • Social network (FOAF) - ✓ • Identifying information ... Difﬁculty: this data (foaf:mbox_sha1sum) is spread across friends’ proﬁles. Must be collected together before use.

Distributed Social Information • What about using Flickr, Twitter, ... account URLs as identifyers? - Identifying properties are only useful if other sites also knows this data - Entering all the URLs again and again?! • Describe these accounts once - Applications can get this info from your homepage (e.g., described in FOAF)

http://apassant.net/blog/2008/01/12/one-foaf-ﬁts-all/

Open Questions • Who owns this information? • You should have ability to backup and reuse your social network info (you own the data!) • Privacy • ... ... ...

Thank you! • http://wiki.foaf-project.org/FAQ • http://captsolo.net/info • #webcamp (look for more info tagged “webcamp”)

FOAF for Social Network Portability

by Uldis Bojars on Mar 02, 2008

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