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Unit no. Unit no. 55 Digital LibraryDigital Library
Adolf KnollAdolf Knoll
National Library of the Czech RepublicNational Library of the Czech Republic
[email protected]@nkp.cz
© Adolf Knoll, National Library of the Czech Republic
Learning objectivesLearning objectives
After the completion of this unit the learner will be After the completion of this unit the learner will be able to:able to:Understand what to do with the digitized content Understand what to do with the digitized content he/she created in his/her digitization projecthe/she created in his/her digitization projectUnderstand which functions of the Digital Library Understand which functions of the Digital Library may be considered crucial for its successful may be considered crucial for its successful operationoperationHave a basic orientation in the coexistence and Have a basic orientation in the coexistence and cooperation of the Digital Library in a larger cooperation of the Digital Library in a larger information environment on Internetinformation environment on Internet
Digital LibraryDigital Library
It is designed to aggregate the digital content It is designed to aggregate the digital content that should be presented altogetherthat should be presented altogether
It has usually two large component parts:It has usually two large component parts: A searchable database that is using the processed A searchable database that is using the processed
and indexed XML files from the digital documentsand indexed XML files from the digital documents A viewer for serving the images efficientlyA viewer for serving the images efficiently
The database operates centrally, but the data The database operates centrally, but the data banks with images, audio or video files can be banks with images, audio or video files can be dispersed in Internetdispersed in Internet
DLdatabase
Data Bank1
Data Bank2
Data Bankn
……………………
The databaseThe database
The database can communicate with portals via The database can communicate with portals via communication protocols, preferably via OAI-PMH (Open communication protocols, preferably via OAI-PMH (Open Archive Initiative – Protocol for Metadata Harvesting) or Archive Initiative – Protocol for Metadata Harvesting) or Z39:50 (no longer preferred)Z39:50 (no longer preferred)
OAI-PMH – it enables harvesting of metadata and creation of a OAI-PMH – it enables harvesting of metadata and creation of a central index at the portal that can navigate the user through central index at the portal that can navigate the user through manz digital libraries and resources from a uniform interfacemanz digital libraries and resources from a uniform interface
Z39:50 – it communicates in real time and slows down the Z39:50 – it communicates in real time and slows down the response of the portal to user’s needsresponse of the portal to user’s needs
Example: The European Library TEL is such a portal Example: The European Library TEL is such a portal enabling fast search in hundreds of resources / enabling fast search in hundreds of resources / http://theeuropeanlibrary.orghttp://theeuropeanlibrary.org
Added technological values of the Added technological values of the digital library (DL)digital library (DL)
DL itself can implement a portal technology and DL itself can implement a portal technology and via metadata harvesting offer larger services to via metadata harvesting offer larger services to its users / it can search in parallel in cooperating its users / it can search in parallel in cooperating resourcesresourcesDL viewer can offer enhanced viewing DL viewer can offer enhanced viewing opportunities via:opportunities via: Application of more image quality levels for Application of more image quality levels for
representation of a single page/objectrepresentation of a single page/object Application of an image server working on demand Application of an image server working on demand
where necessarywhere necessary Application of a combined display of image with Application of a combined display of image with
parallel full textparallel full text
Manuscriptorium Digital Library viewer offers various quality levels ofManuscriptorium Digital Library viewer offers various quality levels ofdigital images for the same pagedigital images for the same page
Normal quality
Thumbnail/Galleryquality
Preview quality
Usually the pageis represented by:• thumbnail• preview• low• black-and-white• normalquality images
Manuscriptorium viewer serving historical maps using LizardtechManuscriptorium viewer serving historical maps using LizardtechExpress Image Server – a possible solution for access to large images Express Image Server – a possible solution for access to large images on Interneton Internet
Manuscriptorium Digital Library combined viewerManuscriptorium Digital Library combined viewerPage image with full textPage image with full text
OAI-PMH profileOAI-PMH profile
The profile in OAI-PMH (also in Z39:50) is The profile in OAI-PMH (also in Z39:50) is a metadata record that is offered by the a metadata record that is offered by the resource to be harvested by the portalresource to be harvested by the portal
It can be any kind of agreed record, but for It can be any kind of agreed record, but for OAI-PMH one of the offered profiles must OAI-PMH one of the offered profiles must be a Dublin Core Unqualifiedbe a Dublin Core Unqualified recordrecord
Useful referencesUseful references
http://dublincore.org/documents/http://dublincore.org/documents/2001/04/12/usageguide/2001/04/12/usageguide/ / Dublin Core / Dublin Core Metadata Initiative User GuideMetadata Initiative User Guidehttp://www.openarchives.org/ / Open http://www.openarchives.org/ / Open Archives InitiativeArchives InitiativeDigital Library Initiatives / there are many Digital Library Initiatives / there are many and should be seen as cultural and and should be seen as cultural and political programmes or projects / just political programmes or projects / just search the web to find some of themsearch the web to find some of them
Examples of digital librariesExamples of digital libraries
Gallica (National Library of France)Gallica (National Library of France)
Manuscriptorium (National Library of the Manuscriptorium (National Library of the Czech Republic)Czech Republic)
The New York Public Library Digital The New York Public Library Digital CollectionCollection
Digital Library of IndiaDigital Library of India
