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Digital Libraries, K. Stefanov
 

Digital Libraries, K. Stefanov

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    Digital Libraries, K. Stefanov Digital Libraries, K. Stefanov Presentation Transcript

    • Modern repositories for storage of scientific information
      • Assoc. Prof. Dr. Krassen Stefanov
      • FMI, Director UCC
      • NIS-SU
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • Share.TEC system architecture
      • NIS-SU
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • User functions
      • User functions can be classified into several groups:
        • Account management functions
        • Profile management functions
        • Searching and navigation functions
        • Authoring functions
      • NIS-SU
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • Browsing (Navigation)
      • This function allows the user to browse the Share.TEC repository using different navigation paths based on TEO.
      • NIS-SU
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • 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
      11/16/09
    • Availability of user functions
      • NIS-SU
      11/16/09 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