ODU CS 751/851 Spring 2010 Michael L. Nelson Introduction to Digital Libraries Week 5: Social Graphs Old Dominion University Department of Computer Science CS 751/851 Spring 2010 Michael L. Nelson 02/08/10

ODU CS 751/851 Spring 2010 Michael L. Nelson From Documents… Dan lives in Zetland road, Bristol, UK with Libby and Craig. Dan's address is Libby's address is Craig's is Dan and Libby work for an organisation called "ILRT" whose website is at Craig works for "Netgates", an organisation whose website is at Craig's wife Liz lives in Bristol with Kathleen. Kathleen and Liz also work at "Netgates". Damian lives in London. Martin knows Craig, Damian, Dan and Libby quite well. Martin lives in Bristol and has an address of (etc...) example from:

ODU CS 751/851 Spring 2010 Michael L. Nelson …to Data Dan lives in Zetland road, Bristol, UK with Libby and Craig. Dan's address is Libby's address is Craig's is Dan and Libby work for an organisation called "ILRT" whose website is at Craig works for "Netgates", an organisation whose website is at Craig's wife Liz lives in Bristol with Kathleen. Kathleen and Liz also work at "Netgates". Damian lives in London. Martin knows Craig, Damian, Dan and Libby quite well. Martin lives in Bristol and has an address of (etc...) example from:

ODU CS 751/851 Spring 2010 Michael L. Nelson Friend of a Friend FOAF -- currently, probably the most widespread application of RDF – The next several examples taken from Edd Dumbill's "Finding Friends with XML and RDF" – rary/x-foaf.htmlhttp:// rary/x-foaf.html

ODU CS 751/851 Spring 2010 Michael L. Nelson Edd Describing Edd <rdf:RDF xmlns:rdf=" xmlns:foaf=" Edd Dumbill

ODU CS 751/851 Spring 2010 Michael L. Nelson More Edd… Edd Dumbill edd <foaf:depiction rdf:resource=" />

ODU CS 751/851 Spring 2010 Michael L. Nelson Edd Has a Friend Edd Dumbill... Simon St.Laurent

ODU CS 751/851 Spring 2010 Michael L. Nelson Open World Means Merger "The Great Triple Store in the Sky" <rdf:RDF xmlns:rdf=" xmlns:foaf=" Edd Dumbill Simon St.Laurent Eric van der Vlist <rdf:RDF xmlns:rdf=" xmlns:foaf="

ODU CS 751/851 Spring 2010 Michael L. Nelson Merged Result <rdf:RDF xmlns:rdf=" xmlns:foaf=" Edd Dumbill Simon St.Laurent Eric van der Vlist

ODU CS 751/851 Spring 2010 Michael L. Nelson Additional Fields Peter Parker Male Mr Peter Parker cf2f4bd069302febd8d7c26d803f63fa7f20bd82

ODU CS 751/851 Spring 2010 Michael L. Nelson foaf:knows Relationship … Harry Osborn Peter Parker Aunt May

ODU CS 751/851 Spring 2010 Michael L. Nelson Other Relationships <rdf:RDF xmlns:rdf=" xmlns:foaf=" xmlns:rel=" Spiderman Green Goblin Peter Parker Harry Osborn Norman Osborn

ODU CS 751/851 Spring 2010 Michael L. Nelson <rdf:RDF xmlns:rdf=" xmlns:foaf=" xmlns:dc=" Peter Parker Spiderman Green Goblin Battle on the Statue Of Liberty With DC

ODU CS 751/851 Spring 2010 Michael L. Nelson Autodiscovery for FOAF In the head of your.html file: <link rel="meta" type="application/rdf+xml" title="FOAF" href="foaf.rdf" /> Example: <link rel="meta" type="application/rdf+xml" title="Contact" href="contact" /> Link to: See:

ODU CS 751/851 Spring 2010 Michael L. Nelson Xhtml Friends Network FOAF is either done with separate RDF files, or integrated into the HTML with RDFa with and tags XFN is a simpler, albeit lower fidelity approach to the same thing by using the "rel" attribute in or elements –next several examples from: –an example of "microformats" -- the bottom-up contrast to RDF

ODU CS 751/851 Spring 2010 Michael L. Nelson XFN Example from: David wrote about a new theory... to: <a rel="colleague met" href=" David wrote about a new theory... In HTML, rel can take multiple space separate values. In Atom, rel can only take a single value.

ODU CS 751/851 Spring 2010 Michael L. Nelson More Precision David wrote about a new theory...

ODU CS 751/851 Spring 2010 Michael L. Nelson 18 Different rel Types… perhaps the most interesting: rel="me" useful for linking to other versions of "me" at different sites…

ODU CS 751/851 Spring 2010 Michael L. Nelson MLN

ODU CS 751/851 Spring 2010 Michael L. Nelson Google Social Graph API What kind of services can we build on the various FOAF & XFN links out there? Google Social Graph – –next several examples taken from the above website See also Yahoo's SearchMonkey – e/profile_vocab.htmlhttp://developer.yahoo.com/searchmonkey/smguid e/profile_vocab.html

ODU CS 751/851 Spring 2010 Michael L. Nelson Mining me links XFN rel="me" links FOAF converted to me : –elements: weblog, homepage, openid, mbox_sha1sum –links:.html to.rdf others: –foaf:knows --> xfn:contact –more info: es.html es.html

ODU CS 751/851 Spring 2010 Michael L. Nelson The Social Graph API ? & & Where the possible methods are: lookup: low-level access to the graph. otherme: given one or more of a person's identifiers (e.g. URLs), return other identifiers for that person. testparse: test your site's XFN or FOAF to see what the Social Graph API's parsers find in it

ODU CS 751/851 Spring 2010 Michael L. Nelson SocialGraph Node Mapper sgn://social-network.example.com/?ident=brad see:

ODU CS 751/851 Spring 2010 Michael L. Nelson Site Connections (me links) My music blogmusic blog My research group blogresearch group blog My homepagehomepage Carlton's LinkedIn pageLinkedIn page

ODU CS 751/851 Spring 2010 Michael L. Nelson Friends Kevin Marks home pagehome page Others?

ODU CS 751/851 Spring 2010 Michael L. Nelson Visualizing RDF: Welkin Visualization of: with

ODU CS 751/851 Spring 2010 Michael L. Nelson Others FOAF Explorer – –(didn't work for me) Zitgist – –(also didn't work for me) FOAFer – –(not compatible w/ my version of Mozilla) FOAFnaut – –(doesn't work; can't find it at jibbering.com)

ODU CS 751/851 Spring 2010 Michael L. Nelson QDOS tools Upload a FOAF profile: – Find a FOAF profile: –

ODU CS 751/851 Spring 2010 Michael L. Nelson Viewing Results: Eric Miller

ODU CS 751/851 Spring 2010 Michael L. Nelson FOAF.Vix One that apparently works! – – visualizer.org/?uri= foaf.rdfhttp://foaf- visualizer.org/?uri= foaf.rdf

ODU CS 751/851 Spring 2010 Michael L. Nelson Sample Output

ODU CS 751/851 Spring 2010 Michael L. Nelson RDF Validator W3C Validator – –(others available) –for: df (validator link) dfvalidator link –but for: I get an error (validator link) link

ODU CS 751/851 Spring 2010 Michael L. Nelson Validator Error