1. VI-SEEM Data Repository
Vladimir Dimitov
IICT-BAS
acknwloedgements to Vladimir Slavnić IPB
The VI-SEEM project initiative is co-funded by the European Commission under the H2020 Research Infrastructures contract no

2. Agenda VI-SEEM Data Repository Underlying Software Technology
Hardware Implementation
Benefits of VI-SEEM Repo
Features
Types of data
Information Model
The DSPACE (VI-SEEM Repo) Architecture
Repository Organization
Examples
Total number of slides: 25
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct

3. VI-SEEM Repository
The VI-SEEM Repository provides long term data preservation, suitable for data set sharing
Use cases
To store curated data sets for long term preservation
To share those datasets with selected collaborators or open them up to whole communities, via web interface
To make such data sets searchable by means of associating meta data and then harvesting them
Enables scientific communities to capture and describe digital works using a custom submission workflow module
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4. Underlying Software Technology
Based on DSpace (
DSpace is a platform that allows you to capture items in any format – in text, video, audio, and data. It distributes it over the web. It indexes your work, so users can search and retrieve your items. It preserves your digital work over the long term.
Developed by the MIT Libraries with support from the HP-MIT Alliance
A platform to build an Institutional Repository
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5. Hardware Implementation
The VI-SEEM Repo is installed on a virtual machine with 8 GB RAM and 4 virtual cores.
The physical hosting server is an IBM 3650 M4, with 2 eight core CPUs and 128 GB RAM.
The storage array is formated with GPFS and it is connected over infiniband (56 Gbit/s), using IBM GSS and ESS storage servers. Failover issues are handled automatically by GPFS.
The storage capacity dedicated to the Repo is 50 TB. Currently around 16 TB are occupied with useful data.
Hosted and maintained by GRNET.
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct

6. Benefits of VI-SEEM Repo
Some example benefits:
Getting your research results out quickly, to a worldwide audience
Reaching a worldwide audience through exposure to search engines such as Google
Storing reusable teaching materials that you can use with course management systems
Archiving and distributing material you would currently put on your personal website
Storing examples of students’ projects (with the students’ permission)
Showcasing students’ theses (again with permission)
Keeping track of your own publications/bibliography
Having a persistent network identifier for your work, that never changes or breaks
No more page charges for images. You can point to your images’ persistent identifiers in your published articles.
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct

7. Features User Interface
Web based, for submission, end-user and System Administrators
Search and retrieval of items by browsing or searching the metadata
Workflow
Enables differing submission workflows for communities
Models "e-people" who have "roles" in the workflow of a particular Community in the context of a given collection
Persistent Identifiers (Handles)
Implements CNRI handles as the persistent identifier associated with each item
Soon to be integrated with the VI-SEEM PID service
Access Control
Allows contributors to limit access to items in the repository, at both the collection and the individual item level
Integrated with the VI-SEEM Login Service
Metadata Schema
Utilises Qualified Dublin Core
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8. Types of data in the VI-SEEM Repository
Articles
Preprints, e-prints
Technical Reports
Working Papers
Conference Papers
E-theses
Audio/Video
Lecture notes, Visualizations, simulations
Datasets in various formats
Experimental
Simulation
Input
Output
Images
Visual, scientific
Teaching material
Digitized library collections
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct

9. Information Model Communities Collections (in communities)
Departments, Labs, Research Centers, Schools…
Collections (in communities)
Distinct groupings of like items
Items (in collections)
Logical content objects
Receive persistent identifier
Bitstreams (in items)
Individual files
Receive preservation treatment
Versioning- Item “versions” can be
All instances of a work in different formats
E.g. the XML, PDF, and PostScript versions
All editions of a work over time
Metadata lists all available versions of items
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10. The DSpace (VI-SEEM Repo) Architecture
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11. Repository Organization
Each Dspace service is comprised of Communities – the highest level of the Dspace content hierarchy
Communities may be:
Departments
Labs
Research Centres
Schools
Each community contains descriptive metadata about itself and the collections contained within it
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12. Collections
Each community in turn have collections which contain items or files
Collections can belong to a single community or multiple communities (collaboration between communities may result in a shared collection)
As with communities, each collection contains descriptive metadata about itself and the items contained within it
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct

13. Example Structures
Structures may be based around organizational units:
Structures are hierarchical:
Community
Collection
Items
Life Sciences
MD Data
Climate
Future Climate Modelling
Digital Cultural Heritage
Social Sciences Library
Community
Sub Community
Collection
Item
Life Sciences
Molecular Dynamics
Cancer Related Data
....
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14. Example: Home screen
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15. Example: Climate Sciences community
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16. Example: Browsing by title
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17. Example: Submissions and Workflow tasks
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18. Example: Item submission, first step
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19. Example: Item submission, description
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20. Example: Item submission, third step
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21. Example: File upload
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22. Example: Item review
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23. Example: Add Creative Commons (CC) license
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24. Example: Distribution license
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25. Thank you for your attention. Questions?
Conclusion
The VI-SEEM Repository is the main place for long term data preservation, suitable for dataset sharing.
The implementation is based ot DSpace popular open source technology for building large data repositories.
The VI-SEEM Repository is hosted on a high-performance infrastructure.
Types of data may include:
Measurements, Visualizations, Simulations, Audio/Video, Images,
Digitized library collections, Articles, Technical Reports, training materials, raw data etc.
The dataset items are described with detailed metadata records, which must be carefully and patiently filled in by the senders.
A carefully selected license must be assigned to each dataset item.
Thank you for your attention. Questions?
VI-SEEM Regional Climate Training event - Belgrade, Serbia, Oct