How the semantic web is being used an analysis of foaf documents
Download
1 / 20

How the Semantic Web is Being Used: An Analysis of FOAF Documents - PowerPoint PPT Presentation


  • 124 Views
  • Uploaded on

How the Semantic Web is Being Used: An Analysis of FOAF Documents. Li Ding, Lina Zhou, Tim Finin, Anupam Joshi eBiquity Lab, Department of CSEE University of Maryland Baltimore County. Outline. Introduction The six popular ontologies FOAF vocabulary Why FOAF

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' How the Semantic Web is Being Used: An Analysis of FOAF Documents' - auryon


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
How the semantic web is being used an analysis of foaf documents

How the Semantic Web is Being Used:An Analysis of FOAF Documents

Li Ding, Lina Zhou, Tim Finin, Anupam Joshi

eBiquity Lab, Department of CSEE

University of Maryland Baltimore County


Outline
Outline

  • Introduction

    • The six popular ontologies

    • FOAF vocabulary

    • Why FOAF

  • Building FOAF Document collection

    • FOAF Document Identification

    • FOAF Document Discovery

    • Popular Properties of foaf:Person

  • Applications

    • Personal Information Fusion

    • Social Network Analysis


The six most popular ontologies
The Six Most Popular Ontologies

RDF

DC

RSS

MCVB

FOAF

RDFS

The statistics is generated by http://swoogle.umbc.edu


FOAF vocabulary

(http://xmlns.com/foaf/0.1/)

@


Why foaf
Why FOAF

  • Information Creators

    • Community membership management

    • Unique Person Identification (privacy preserved)

    • Indicating Authorship

  • Information Consumers

    • Provenance tracking

    • Social networking

      • Expose community information to new comers

      • Match interests

    • Trust building block


Identify a foaf document
Identify a FOAF document

  • D is a generic FOAF document when 1,2,3 met

  • D is a strict FOAF document when 1,2,3,4 met

  • D is an RDF document.

  • D uses FOAF namespace

  • The RDF graph serialized by D contains the sub-graph below

  • D defined one and only one master Person

foaf:Person

rdf:type

X

foaf:Y

Z


Foaf document discovery
FOAF document Discovery

  • Bootstrap: using web search engine (Got 10,000 docs)

  • Discovery: using rdfs:seeAlso semantics (Got 1.5M docs)

Top 7 FOAF websites


Popular properties of foaf person 1 2
Popular properties of foaf:Person (1/2)

Top 10 popular properties (per document)

*DS-FOAF-SMALL is a newly dataset in Oct 2004, based on 7276 evenly sampled documents.


Popular properties of foaf person 2 2
Popular properties of foaf:Person (2/2)

Top 10 popular properties (per instance)

*DS-FOAF-SMALL is a newly dataset in Oct 2004, based on 7276 evenly sampled documents.


Collecting personal information
Collecting Personal Information

http://www-2.cs.cmu.edu/People/fgandon/foaf.rdf

http:www.cs.umbc.edu/~dingli1/foaf.rdf


Caution collision mistake
Caution: Collision? Mistake!

caution

http://www.ilrt.bris.ac.uk/people/cmdjb/webwho.xrdf

http://www.mindswap.org/~katz/2002/11/jordan.foaf


Sna1 instances of foaf person per doc
SNA1: Instances of foaf:Person per doc

  • Zipf’s distribution

  • Sloppy tail: few person directory documents contains thousands of instances

Cumulative distribution


Sna2 instances of foaf person per group
SNA2: Instances of foaf:Person per group

A group refers to a fused person

  • Zipf’s distribution

  • Sloppy tail: some instances are wrongly fused due to incorrect FOAF documents

Cumulative distribution


Sna3 in degree of group
SNA3: In-degree of group

  • Zipf’s Distribution

  • Sharp tail: few FOAF documents have large in-degrees

Cumulative distribution


Sna4 out degree of group
SNA4: Out-degree of group

  • Zipf’s distribution

  • Sloppy tail: few person directory documents

Cumulative distribution


Sna5 patterns of foaf network
SNA5: Patterns of FOAF Network

  • Four types of group

    • Isolated

    • Only in

      • only one inlink (97%)

    • Only out

    • Both (intermediate)

  • Basic Patterns:

    • Singleton: (isolated)

    • Star: (only out) an active person publishes friends

    • Clique: a small group


Sna6 size of components
SNA6: Size of components

  • Zipf’s distribution

  • Sloppy head: singleton

  • Sloppy tail: blog websites (e.g. www.livejournal.com)

Cumulative distribution



The map of foaf network jun 2004
The Map of FOAF network (Jun,2004)

Blog.livedoor.jp

non-blog

www.ecademy.com

www.livejournal.com


Questions

Questions?

Demo: http://apple.cs.umbc.edu/semdis

Swoogle: http://swoogle.umbc.edu

eBiquity group: http://ebiquity.umbc.edu


ad