Modern repositories for storage of scientific information, K. Stefanov
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The document discusses digital libraries and repositories for storing scientific information. It describes their main functions such as collecting and curating digital collections, managing research activities, and sharing information. It also covers issues around collecting and sharing content, metadata standards, the Open Access Initiative, and protocols like OAI-PMH that allow interoperability between repositories.
Modern repositories for storage of scientific information, K. Stefanov
- 1. Modern repositories for storage of scientific information Assoc. Prof. Dr. Krassen Stefanov FMI, Director UCC NIS-SU 05/17/10
- 2. Digital Library (Repository) Library in which collections are stored in digital formats (as opposed to print, microform, or other media) and accessible by computers The digital content may be stored locally, or accessed remotely via computer networks A digital library is a type of information retrieval system NIS-SU 05/17/10
- 3. Main functions offer the outputs to the world maximise the visibility and enhance impact showcase and sell results / products to collect and curate digital collections to manage research and teaching activities workspace for collaborative projects development and sharing of digital teaching materials and aids access to student achievements NIS-SU 05/17/10
- 4. Some issues How to collect content How to look after the content How to add value to the content How to share information with other digital libraries How to offer services to end users How to ensure legally sound operations How to ensure interoperability How to make it sustainable NIS-SU 05/17/10
- 5. Metadata Data about data Describe various characteristics of the digital objects stored in the library Used for cataloguing purposes Many standards available (metadata schemes) There is no official only one standard set Dublin Core (DC) is de-facto standard NIS-SU 05/17/10
- 6. Open Access Initiative (OAI) Main goal: open access as the worldwide electronic distribution of peer-reviewed literature and completely free and unrestricted access to it by all scientists, scholars, teachers, students and other curious minds First declared in Budapest, best known as Berlin Declaration ( http://www.openarchives.org/ ) Includes (a) authors grant free access to users; (b) full version available in at least one digital library NIS-SU 05/17/10
- 7. OAI Protocols OAI-PMH: Protocol for Metadata Harvesting – for exposing all metadata descriptions in the digital library for free use of others ( http://www.openarchives.org/ pmh/ ) OAI-ORE: Object Reuse and Exchange – for exchange of digital objects (mainly for software programs providing authoring, exchange, reuse, visualization etc. of all digital objects in the digital library) ( http://www.openarchives.org/ ore/ ) NIS-SU 05/17/10
- 8. European picture In 2006 about 230 institutes had at least one digital library established In last two years at least one new library was created daily More than 95% of European digital libraries support OAI (mostly through OAI-PMH) eContent and eContentplus program Two big initiatives: DRIVER and Europeana NIS-SU 05/17/10
- 9. DRIVER Digital Repository Infrastructure Vision for European Research (currently DRIVER II) Main goal: to create a knowledge base for European research DRIVER I funded under FP6, DRIVER II under FP7 http://www.driver-support.eu/ Includes only OAI-compliant libraries Members from almost all European countries Many subject-specific libraries NIS-SU 05/17/10
- 10. EUROPEANA Common multilingual access point which will make it possible to search Europe’s distributed digital cultural heritage online http://www.europeana.eu/ Many projects aiming to achieve the goal Bulgarian National Library included Part of the European i2010 Initiative Online from 20 November 2008 All work coordinated by EDL Foundation NIS-SU 05/17/10
- 11. Features (2) Provide more comprehensive user feedback (rating and annotating) Recommendations and tagging services Scheduler (user wizards and workflow management) User wizards and workflow management User Authentication and user management services NIS-SU 05/17/10
- 12. Features (3) Community vizualization and navigation Service Community participation Service Interactive creation of metadata records using the RICK tool Organize resources as favourites by a user via tags NIS-SU 05/17/10
- 13. Share.TEC system architecture NIS-SU 05/17/10
- 14. Share.TEC Repository Share.TEC Repository (or central repository) is the main component Contains metadata representing resources from the Teacher Education (TE) domain Metadata are stored in CMM format OAI-PMH protocol is used for search an retrieving metadata in CMM format from partners and external repositories Contains the representation of TEO ( T eacher E ducation O ntology ) NIS-SU 05/17/10
- 15. OAI-PMH Harvester Special computer program which periodically connects to all metadata sources Collect new instances of metadata from this sources Validation of the collected metadata through the validation service Publishes collected metadata to central repository via SPI ( Simple Publishing Interface ) protocol NIS-SU 05/17/10
- 16. Share.TEC Web Portal Multilingual user interface Personalization Queries in the user’s native language Simple and advanced range of parameters for query filtering NIS-SU 05/17/10
- 17. Share.TEC Web Portal (2) Key parameter values automaticaly set in accordance with user profile Based on TEO a multidimensional data search Automatic ranking of search results in accordance with user profile characteristics NIS-SU 05/17/10
- 18. Partner’s and external repositories External well-known digital repositories , containing relevant TE domain metadata, as well as the local repositories established at each project partner site are essential component of the system To support of CMM metadata records a specific program called MMF (Metadata Migration Facility) is provided which main role is translate from well known metadata formats to CMM format. NIS-SU 05/17/10
- 19. RICK (Resource Integration Companion Kit) RICK is a comprehensive tool for the creation of new metadata records Provides support to individual user setting some of the metadata fields’ values automatically (e.g. file type, owner, date, keywords, etc.) and offering a web form for filling the required and optional field from CMM metadata format NIS-SU 05/17/10
- 20. User functions User functions can be classified into several groups: Account management functions Profile management functions Searching and navigation functions Authoring functions NIS-SU 05/17/10
- 21. Account management functions These are functions related to creating and removing user accounts, logging in and out of the system and password reset. They are: register, unregister, log-in, log-out, password reset, profile change. NIS-SU 05/17/10
- 22. Profile management functions These functions allow the user to modify his/her profile and customize how Share.TEC presents information. They are: personal profile, custom front page, preferences, multilingual interface . NIS-SU 05/17/10
- 23. Searching and navigation functions These functions provide the ability to browse, filter, and search the data which is stored at Share.TEC repository. They are: browsing (navigation), searching, filtering, and alerts . NIS-SU 05/17/10
- 24. Browsing (Navigation) This function allows the user to browse the Share.TEC repository using different navigation paths based on TEO. NIS-SU 05/17/10
- 25. Searching To perform searching queries against Share.TEC data the user provides a list of search criteria. The searching function provides the used with forms to fill-in these criteria, performs the actual search and provides results back to the user. Searching for registered users may be fine-tuned by searching preferences provided by the user in his/her profile. NIS-SU 05/17/10
- 26. Faceted search (filtering) This function is similar to the searching in a way that it also allows the user to set criteria for filtering information. The user is only given facets and constraints that make sense in the context of the items they are looking at. The user always knows what to expect before they apply a constraint NIS-SU 05/17/10
- 27. Search Alerts users may set an automatic notification system which is triggered whenever the user condition is fulfilled. users receive alerts when: new content with specific properties is being added to the repository by the community, existing content has passed a predefined ranking threshold or a new actor with specific properties is registered. NIS-SU 05/17/10
- 28. Authoring functions These functions allow the user to contribute to the Share.TEC content by providing annotations, ranking and additional references. They are: annotation, ranking, enriching, and adding references . NIS-SU 05/17/10
- 29. Availability of user functions NIS-SU 05/17/10 Function Availability for users Unregistered Registered Logged out Logged in 1. Account management Register (sign up) Yes Yes – Unregister – – Yes Log in – Yes – Log out – – Yes Password reset – Yes – 2. Profile management Personal profile – – Yes Custom front page – – Yes Preferences – – Yes Multilingual interface Yes Yes Yes 3. Searching and navigation Browsing Yes Yes Yes Basic Searching Yes Yes Yes Advanced Searching – – Yes Basic Filtering Yes Yes Yes Advanced Filtering – – Yes Alerts – Yes Yes 4. Authoring Annotation – – Yes Ranking – – Yes Adding metadata – – Yes