Distributed Semantic Social Networks:
Architecture and Applications

Current State of the Social Web

Current State of the Social Web

Current State of the Social Web

Motivation

• Privacy
• Data Security
• Data Ownership
• Extensibility
• Reliability
• Freedom of Communication

Motivation

• Privacy
• Data Security
• Data Ownership
• Extensibility
• Reliability
• Freedom of Communication

Motivation

• Privacy
• Data Security
• Data Ownership
• Extensibility
• Reliability
• Freedom of Communication

Approach

Based on the given motivational points, the following contributions were made:

• An architecture of a Distributed Semantic Social Network
• An implementation of the architectures protocols
• Implementation of different application prototypes, which verify and demonstrate this architecture

Architecture: Basic Principles

• Linked Data
  • main protocol for data publishing, retrieval and integration
  • de-referencable and interlinked resources
  • fosters extensibility and a distributive overall character
• Service Decoupling
• Protocol Minimalism

Architecture: Basic Principles

• Linked Data
• Service Decoupling
  • unravel services/application from the users data
  • settles ownership to the user
  • fosters privacy and pushes distribution
• Protocol Minimalism

Architecture: Basic Principles

• Linked Data
• Service Decoupling
• Protocol Minimalism
• communicate RDF triples between DSSN nodes
• do not enforce workflow or exact interpretation
• ensures the extensibility of the data model

Architecture: Big Picture

Architecture: Data Layer

Architecture: Protocol Layer

Semantic Pingback: Usage

• Based on an extension of the well-known Pingback technology
• Adds support for Linked Data resources including RDFa, and named links/relations.
• Two-fold usage:
  • Facilitate the first contact between two WebIDs and establish a new connection (Friending)
  • Ping the owner of different social network artefacts while doing an activity with that artefact (tagging an image, sharing a website from the owner).

Semantic Pingback: Architecture

Architecture: Service Layer

Architecture: Application Layer

Architecture

Architecture: Triple Distribution

xOperator

xOperator

Mobile Social Semantic Web

OntoWiki

• A general purpose Linked Data wiki
• A testbed for around 30% of AKSW projects
• Provides protocol support for Semantic Pingback, PubSubHubbub, Linked Data, ...
• A full featured browser based DSSN client (via extensions)

OntoWiki

Contributions

• Overall architecture
• Data Layer: dssn schema, history feeds
• Protocol Layer: Semantic Pingback, WebID deputy extension
• Service Layer: ping service
• Application Layer: xOperator, Mobile Social Semantic Web Client, OntoWiki

Publications: Overview

• Number of publications:
  • DBLP: 21
  • Google Scholar: 41
  • My Own list: 43
• Google Scholar Ranking:
  • Citations: 512
  • h-index: 9
  • i10-index: 8
• Directly related publications: 10 (english, peer reviewed)

Publications: Related

Related major research papers are:

• S.Tramp et al.: An Architecture of a Distributed Semantic Social Network, Semantic Web Journal, 2012 (accepted pending minor revision)
• S.Dietzold et al.: Weaving a Social Data Web with Semantic Pingback In: Proceedings of the EKAW 2010 - Knowledge Engineering and Knowledge Management by the Masses, 2010
• S.Dietzold et al.: xOperator - Interconnecting the Semantic Web and Instant Messaging Networks In: Proceedings of 5th European Semantic Web Conference 2008, 2008
• S.Tramp et al.: Weaving a Distributed, Semantic Social Network for Mobile Users In: Proceedings of the 9th Extended Semantic Web Conference 2011, 2011

Publications

Other related publications are (incl. co-author papers):

• H.Story et al.: Friending On The Social Web In: Federated Social Web Europe 2011
• S.Dietzold et al.: RDFauthor - Employing RDFa for collaborative Knowledge Engineering In: Proceedings of the EKAW 2010
• T.Ermilov et al.: OntoWiki Mobile - Knowledge Management in your Pocket In: Proceedings of the ESWC 2011
• N.Heino et al.: Developing Semantic Web Applications with the OntoWiki Framework In: Networked Knowledge - Networked Media, 2009
• S.Auer et al.: OntoWiki - A Tool for Social, Semantic Collaboration. In: The Semantic Web - ISWC 2006

Next Steps

• Submit until 07/2012
• State of the current document:
  • 130 pages but needs cleanup
  • 90% of the work
  • Currently, I rework images and finish the architecture journal paper

Thank you for your Attention!

My WebID:

• http://sebastian.tramp.name

This slide deck:

• http://seebi.github.com/deck.js/2012-03-01-BISOffsiteMeeting-PhD/