learning object annotation in agricultural learning repositories
DESCRIPTION
Presentation at the 9th IEEE International Conference on Advanced Learning Technologies (ICALT) in Riga, Latvia, 15-17 July, 2009. This presentation provides an overview over the content repository architecture of the Organic.Edunet eContentplus project.TRANSCRIPT
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Learning Object Annotation in Agricultural Learning Repositories
Hannes Ebner1, Nikos Manouselis2, Matthias Palmér1, Fredrik Enoksson1, Nikos Palavitsinis2, Kostas Kastrantas2, Ambjörn Naeve1
1 Royal Institute of Technology (KTH), Sweden2 Greek Research and Technology Network (GRNET), Greece
The 9th IEEE International Conference on Advanced Learning Technologies (ICALT)July 15-17, 2009. Latvia, Riga.
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Overview
• Organic.Edunet – Project Overview• Content Repository – Conceptual Overview• Metadata Annotation• Interoperability• Interfaces• Current Status• Conclusions
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Organic.Edunet
A Multilingual Federation of Learning Repositories with Quality Content for the Awareness and Education of European Youth about Organic Agriculture and Agroecology
• Consortium with 16 project partners from 10 countries• Focus on:
– Interoperability between digital collections of learning resources on organic agriculture and agroecology
– Learning resources– Educational scenarios– Pilot trials
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The Big Picture
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Content Repository - Conceptual Overview
• Abstraction of quad store and binary data• Separation between:
– Entry (Metametadata, ACL, ...)– Resource– Metadata (local, external, extracted)
• Named graphs
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Agricultural Metadata
• Decision between approaches based on LOM and DC– CG LOM Core– FAO Ag-LR AP– LRE extension to LOM
• Organic.Edunet Application Profile– Based on LOM and LRE– Individual modifications to reflect the needs of the project
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Organic.Edunet Application Profile
• Partially the vocabularies are used from LRE v3.0– General Coverage– Metametadata Contribution– Educational
• Learning Resource Type
• Intended End User Role
• Context– Relation Kind
• Creative Commons for Rights Description• Annotation Description holds the quality certification• Ontology terms in Classification Entry
– Organic.Edunet Ontology– AGROVOC (FAO)– CABI (cabi.org)
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Metadata Annotation
• Using “Annotation Tool” based on the SHAME code library• AJAX component, embeddable in web applications• Automatically generated user interface• Based on “Annotation Profiles”• Reusable graph patterns
– Based on QEL– Editor for generating APs (e.g. “I need dcterms:title,
dcterms:subject, foaf:Person, and lom:Contribution”
• Metadata is edited directly in the graph• Leaves metadata outside the graph pattern untouched
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Metadata Annotation 3/3
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Ontology Terms
• Organic.Edunet Ontology– Created by domain experts with the help of the technical
partners– Used for the semantic search in the main portal– Assigned like tags– Includes predicates
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Ontology Term Annotation
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Interoperability
• RESTful interface– {httpverb} {baseuri}/{context}/{kind}/{entry}
– Context & Entry: Integer– Kind: entry|metadata|...– Example: GET http://oe.confolio.org/23/metadata/2
• Support for multiple formats– JSON/JDIL (targeted for web applications)– LOM/XML– RDF (based on the IEEE LTSC LOM/DCAM mapping)– Easy to hook in additional converters
• As much HTTP as possible, e.g. content negotiation
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Harvesting / Querying
• OAI-PMH– Supported formats
• LOM
• Dublin Core– Both directions
• SQI– Translated into SPARQL queries– Layer in between SQI and SPARQL to respect the ACL
• Custom harvesters– FAO Capacity Building Portal
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Current Status
• Intense content population phase during summer 2009• Number of resources
– Harvested: ~6.000– Imported: ~1.000– Manually uploaded/annotated: ~1.000– Target: 10.000
• Harvesting from– Intute (~5.000)– FAO Capacity Building Portal (~1.000)– FAO Corporate Document Repository (~250.000) (sic!)
(planned; filtering for OA to be done)
• Harvesting by– Organic.Edunet Main Portal– Ariadne (planned)– LRE (planned)
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Conclusions
• Web-based tool for learning resource annotation• Transparent application of Semantic Web technologies• Interoperability
– Open standards used wherever possible– LOM/XML <-> DCAM– Linked Data
• Well prepared for federations• Generic applicability
– Not restricted to Organic Agriculture
• Seperate reusable components– Annotation Tool: flexible metadata editor– SCAM: resource and metadata management framework– Confolio: e-portfolio web application (in combination with
SCAM)
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http://www.organicedunet.eu
Acknowledgement
The work presented in this paper was partially performed in the Organic.Edunet project which is supported by the EC under the eContentplus programme, Agreement No. ECP-2006-EDU-410012.
Contact Authors
Hannes Ebner ([email protected])
Nikos Manouselis ([email protected])