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REGISTRY SERVICEStandardizing the organization of
our content collections
metadata discovery
harvesting – OAI -PMH
standardization
federation
collections – IMS LODEpublishing– SPI
Cruise Control
Content collection
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REGISTRY SERVICEOverview Small registry demo. Additional information about our work. Requirements. Why do we need the registry? Ariadne use case Architecture. Functionalities of the registry. Synchronization of registries Real functionality of the federation. Federated Search and Harvest. Other approaches Current context Conclusions Future work
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REGISTRY SERVICEAdditional information- Joris Klerkx will present the general GLOBE architecture overview on Thursday at 12:00 ECTEL 2010 (Audit 1).
-Currently, it is used in:
- ASPECT project - http://www.aspect-project.org/- ICOPER project - http://www.icoper.org/- GLOBE consortium - http://www.globe-info.org - Share.TEC project (soon) - http://www.share-tec.eu/
- Do you want to add your repository to the registry? - Contact us! We can talk or send us an email to
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REGISTRY SERVICERequirementsWhere the resources are located?
They need to find material which satisfies their needs
Organization and management
Defining additional information for content collections.
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REGISTRY SERVICEUse case. Ariadne
Federated search layer
Harvester
Federated search layer
Registry
HarvesterHarveste
r
Harvester
Scalability?
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REGISTRY SERVICEArchitectureContent and interfaces
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REGISTRY SERVICEArchitectureDifferent functionalities
User Interface
SQI OAI-PMH SPI REST interface
RSS
Querying using plql
Querying using plql
Harvesting
Publish IMS LODE instances
Querying using plql
Last targets added
Publishing targets SQI,OAI-PMH, SPI
Querying using lucene query language
Querying using lucene query language
Report state of OAI-PMH targets
Editing targets
Querying using vsql
Querying using vsql
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REGISTRY SERVICERegistry data model (1)
IMS LODE Registry based on content collection describes:
The copyright: author – access rights - …
What is the content collection about?
Contains other content collections?
Where is the content collection located and which protocol implements?
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REGISTRY SERVICERegistry data model (2)- A content collection is defined as a group of digital content which is exposed to the world through some protocols based on standards or specifications.
- based on IMS Dublin Core Collections Application Profile specification and complemented with ISO 2146 and IEEE LOM.
Advantages Disadvantages
Flexible (not restrictive in terms of
specifications)
Ambiguous?
Helps to the interoperability between different architectures
Ongoing evaluation…
Ongoing evaluation…
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REGISTRY SERVICEGLOBE approach- There is several ways to create content collections:
- Based on the shared metadata information of the learning resources.
i.e. subject math
- Based on abstract information that a user can defines.
i.e. user description like “this is the content collection usedby me during all my degree”
-This responsibility relies on the content providers because they have to define their own strategies.
Ariadne creates Metadata collectionsRepository <-> Collection
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REGISTRY SERVICEOther approaches
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REGISTRY SERVICECurrent content
68 repositories◦ 23 SQI targets◦ 1 SRU target◦ 52 OAI-PMH targets◦ 1 SPI target
Situation:◦ 7 repositories with SQI+OAI-PMH◦ 1 repository with SQI+OAI-PMH+SPI
Repeated:◦ 1 TLÜ repository. It exists in different collections
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REGISTRY SERVICEConclusions
Federation of registries
The ARIADNE registry exposes more than 1 million of LOs
Optimized management of tools
Interoperability with other networks exposing the collection through standards.
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REGISTRY SERVICEFuture work (1) Integration of the registry in the federated
search layer.
Automatic checking of the availability of the SQI targets.
Access rights and user management?
Proposing improves on the different specifications.
How to deal with the repeated instances?
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REGISTRY SERVICE
Questions?