A Simple Query Interface for Interoperable Learning Repositories Bernd Simon, Zoltán Miklos – Wirtschaftsuniversität Wien / EducaNext Stefaan Ternier, Erik Duval – Katholieke Universiteit Leuven/Ariadne Frans Van Assche, David Massart – European Schoolnet Stefan Brantner – BearingPoint Infonova Daniel Olmedilla – L3S Research Center and Hanover University

Motivation for Interoperability: Educational Repositories Lots of educational repositories do exist Content constitutes critical success Many of the repositories lack critical mass Even those that have critical mass can always use more (reducing maintenance costs) … Ariadne, EU Merlot, US EdNA Online, AUS EducaNext, EU NIME, JP

Lots of educational repositories do exist

Content constitutes critical success

Many of the repositories lack critical mass

Even those that have critical mass can always use more (reducing maintenance costs) …

Motivation for Interoperability: Workplace Learning Today‘s Knowledge Worker Tool: Web Browser + Many Propriatery Web Applications Publishing House Magazins, Journals Online Bookstore Books Intranet Tutorials Intranet Best Practice Studies Online Marketplace Courses

Motivation for Interoperability: Workplace Learning Tommorrow‘s Knowledge Worker Tool: Web Browser + Personalized Search Client + Educational Semantic Network Publishing House Magazins, Journals Online Bookstore Books Intranet Tutorials Intranet Best Practice Studies Online Marketplace Courses Interoperable Smart Space for Learning TM Personalized Search Client

Basic Problem Query? Results Source Target Query Language, Schema Transport Results Format

Architecture of a Solution Query Results Set Query using an agreed Query Language referring to an agreed Schema Transport via Simple Query Interface Protocol Returning Results using an agreed Results Format Based on a Simple Query Interface (SQI)

Interoperability Stack Focus of SQI Messaging Service (e.g., SOAP, XML RPCs, JRMI ) Core Services (e.g., Session Management) Applications (e.g., Query, Harvesting) Network Architecture (e.g., HTTP, SMTP; TCP/IP ) Semantic Model (e.g., Common Query Schema)

Design Rationales for SQI Overall Objective: Light-weight design  Easy adoption (like the Web) Flexible: Synchronous and asynchronous mode Centralized and Peer-to-Peer Stateful - Stateless Open: Query Language (CQL, QEL, XQuery…) Result Format (Complete records or not) Metadata Schema (LOM, DC, …)

Overall Objective:

Light-weight design  Easy adoption (like the Web)

Flexible:

Synchronous and asynchronous mode

Centralized and Peer-to-Peer

Stateful - Stateless

Open:

Query Language (CQL, QEL, XQuery…)

Result Format (Complete records or not)

Metadata Schema (LOM, DC, …)

SQI Methods

Implementation Case Studies ARIADNE’s GLOBE Project ELENA’s Smart Space for Learning TM CELEBRATE/ICLASS Network of interconnect school repositories

ARIADNE’s GLOBE Project

ELENA’s Smart Space for Learning TM

CELEBRATE/ICLASS Network of interconnect school repositories

SQI-Enabled Semantic Network for Personnel Development: ELENA’s Smart Space for Learning HCD Online Amazon.com Gateway EducaNext ELENA Smart Space for Learning SQI SQI LASON, Knowledgebay SQI Seminarshop.at Gateway SQI EduSource Gateway Edutella Gateway Universitärer Lehrverbund Informatik (ULI) Clix WU Wien Executive Academy SQI SQI SQI SQI SQI SQI

Demo http://www.hcd-online.com | Network Search

SQI – Ariadne Ariadne SQI Federated Search SQI Merlot EdNA Online SQI RDN Pond EducaNext SQI ECL SQI ECL Smete SQI ECL SQI EdNA SQI SQI VSQI QEL Gem Voced abcall EdNA EdNA EdNA SQI SQI SQI FedGov EdNA SQI Merlot API

More on SQI http://www.prolearn-project.org/lori/ What you can find there: Specifications WSDL binding Reference implementations Test tools Prototypes you can trial out …

http://www.prolearn-project.org/lori/

What you can find there:

Specifications

WSDL binding

Reference implementations

Test tools

Prototypes you can trial out

…

Thank you! Comments? Questions?

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