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Site Interoperability Projects at DERI Galway's SW Cluster
 

Site Interoperability Projects at DERI Galway's SW Cluster

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Workshop on Semantic Web Interoperability (SWOP) / The Open University, Milton Keynes / 7th February 2005

Workshop on Semantic Web Interoperability (SWOP) / The Open University, Milton Keynes / 7th February 2005

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    Site Interoperability Projects at DERI Galway's SW Cluster Site Interoperability Projects at DERI Galway's SW Cluster Presentation Transcript

    • John Breslin (for Stefan Decker) Site Interoperability Projects at DERI Galway‘s SW Cluster [email_address] www.johnbreslin.com Interop Issues in SW Sites 7 th February 2005
    • SW Cluster: Overview
      • SIOC: Semantically Interlinked Online Community
      • SemanticWeb.org
      • FOAFRealm
      • RDF Datasets for Site Exchange
    • SW Cluster: Overview
      • SIOC: Semantically Interlinked Online Community
      • SemanticWeb.org
      • FOAFRealm
      • RDF Datasets for Site Exchange
    • SIOC: Introduction
      • Issues with online communities:
      • Data on community sites cannot be harnessed correctly
      • Isolated communities discussing complementary topics
      • Information is being repeatedly requested across sites
      • SIOC approach:
      • Ontology
      • Data Interface
      • Inferring Connections
    • SIOC: To Interconnect Bulletin Board Sites
      • boards.ie
      • boards.us
      • boards.jp
      • boards.geek.nz
    • SIOC: Ontology
      • Namespace at
      • rdfs.org/sioc/ns#
    • SIOC: Data Interface (galway +broadband +linux)
    • SIOC: Inferring Connections
    • SW Cluster: Overview
      • SIOC: Semantically Interlinked Online Community
      • SemanticWeb.org
      • FOAFRealm
      • RDF Datasets for Site Exchange
    • SemanticWeb.org: Introduction
      • General interoperability considerations
      • The site
      • RDF/XML views of local data
      • Integration of remote data
      • Data access interface
      • Ontology import and export
      • Possible extensions
    • SemanticWeb.org: General Interop Considerations
      • Basic idea is to use Semantic Web technology to allow different web sites to „work together“
      • Interoperability could cover re-use and integration of other sites‘ models , data , and functionality
      • Presentation layer components (e.g. stylesheets for agreed-on RDF/XML structures) may be considered too
    • SemanticWeb.org: The Site
      • SemanticWeb.org will (soon again ;-)) be the Semantic Web community portal
      • The new (RDF-enhanced) site will provide information about Semantic Web events, people, tools, organisations, projects, and other related resources
      • Both instance data and model information can be added, modified, extended, and exported online
    • SemanticWeb.org: Architecture
    • SemanticWeb.org: RDF/XML Views of Local Data
      • Each portal object (page, channel, blog post, user, vocabulary, SKOS concept, resource description...) can be serialized as RDF/XML
      • Resource Description Discovery (RDD) will be enabled by <link /> tags in XHTML, HTTP headers (X-Metadata-Location) and support for URIQA‘s MGET
      • Direct serving of content-negotiated XHTML vs. RDF/XML is considered bad practice (URI overloading etc.), but HTTP redirects may be triggered on certain accept-headers instead
    • SemanticWeb.org: Integration of Remote Data
      • The site has an „Add URL“ feature to add remotely maintained sources to the portal
      • Information from remote sources will be updated via an RDF crawler (scutter)
      • The final RDF store (Andreas‘ YARS) is going to support HTTP PUT and POST for direct integration of data
    • SemanticWeb.org: Data Access Interface
      • The final portal is going to provide an HTTP-based query interface (probably SPARQL protocol/query language compliant)
      • Together with the portal‘s RDD features, it will be possible to retrieve Concise Bounded Descriptions (CBDs) of resources for re-use in other environments
    • SemanticWeb.org: Ontology Import and Export
      • The portal system has a built-in web-based vocabulary editor and publisher
      • RDFS and OWL term sets can be imported, mixed, and exported
      • Annotation properties are used to add machine-readable presentation information for classes (e.g. re-usable views or forms)
    • SemanticWeb.org: Administration Screenshot
    • SemanticWeb.org: Possible Extensions
      • Add support for functionality re-use (e.g. facilitated sign-up à la FOAFNet)
      • The views are currently generated via PHP code (ontology-guided, though)
      • For improved interoperability, it could make sense to completely separate the presentation layer from program code (e.g. by a stylesheet-like approach and by formally describing the way resource descriptions should be displayed)
    •  
    • SW Cluster: Overview
      • SIOC: Semantically Interlinked Online Community
      • SemanticWeb.org
      • FOAFRealm
      • RDF Datasets for Site Exchange
    • FOAFRealm: Introduction
      • A user management system with social collaborative filtering
      • Embedded mechanisms of authorising and controlling the sharing of resources among users
      • Gives different weights of votes during negotiations
    • FOAFRealm: Features
      • User profiles management system based on FOAF and P2P
        • Information on relationships between users
        • On-time registration*
        • Single sign-on*
      • Access control lists based on the distance and trust level between users
      • Implementation of social collaborative filtering (private bookshelves, annotations, evaluations)
    • FOAFRealm: Architecture
      • Multi-tiered architecture
        • RDF storage independent
        • Can be adapted to environments other than Jakarta Tomcat
      RDF Storage FOAF Manage FOAF Realm (Authentication Plugins) User Interface Guidelines
    • FOAFRealm: Types of Collaborative Filtering
    • FOAFRealm: Social Collaborative Filtering
    • FOAFRealm: Security in Collaborative Filtering
    • FOAFRealm: Calculating Interests
    • FOAFRealm: Related Projects
      • JeromeDL – e-Library with Semantics:
        • FOAFRealm as a user management subsystem
        • Additional layer of P2P communication between instances of the digital library
        • Collaborative filtering as one of the semantically enhanced search services
      • MarcOnt Initiative:
        • FOAFRealm as user management subsystem
        • Calculating distances between community members
        • MarcOnt ontology considered to cover collaborative aspects
    • FOAFRealm: JeromeDL User Profile
    • FOAFRealm: JeromeDL Screenshot
    • RDF Datasets for Site Exchange: Andreas
      • DBLP metadata about 600,000 CS journal papers, conference proceedings (~400 MB)
      • Cleaned-up version of dmoz.org, a human-edited directory of the web (~1.2 GB)
      • Recent semantic web crawl (~300 MB) consisting mostly of RSS 1.0, DC, FOAF, DOAP, and image annotations
    • SW Cluster: Conclusion
      • SIOC: Semantically Interlinked Online Community
      • SemanticWeb.org
      • FOAFRealm
      • RDF Datasets for Site Exchange
      • Thanks for your attention!
      • http://sw.deri.org/