Search Engine Technology for Advanced Services Trond Teigen

Search Engine Technology for Advanced Services Trond Teigen 03/10/2020 Search Engine Technology for Advanced Services 1

Content 1. 2. 3. 4. 5. What do we want to achieve? Challenges How do we achieve what we want? Some examples Summary 03/10/2020 Search Engine Technology for Advanced Services 2

What is the user looking for? To search the total amount of available knowledge and culture Ø Different approaches - Access to the actual documents! Ø Different levels of quality, legal issues + infrastructure 03/10/2020 Search Engine Technology for Advanced Services 3

Different access gates - Search ala Internet Different kinds of portals Geographic approach Point in time (timescale) Digital storytelling 03/10/2020 Search Engine Technology for Advanced Services 4

Search ala Internet - Unstructured and/or structured data Simple and advanced searching Ranking of hits Presentation? 03/10/2020 Search Engine Technology for Advanced Services 5

Portals - Subjects portal Portal for legal issues Cultural portal Topic portal - Resource demanding! - Dynamic portal? 03/10/2020 Search Engine Technology for Advanced Services 6

Geographic approach and timescale - User friendly Requirements to metadata Geographical names are time dependent Combining time, place and search 03/10/2020 Search Engine Technology for Advanced Services 7

Digital storytelling - Interactive storytelling Adventure! Associations Lead the way in to content Resource demanding! 03/10/2020 Search Engine Technology for Advanced Services 8

The National library today Internet National library 03/10/2020 Search Engine Technology for Advanced Services 9

The National library tomorrow National library id meta Internet 03/10/2020 CMS Search Engine Technology for Advanced Services 10

Challenges - Metadata Identification Content format System architecture Exchanging contents and metadata User interface Rights management and act of privacy Autentication and authorisation 03/10/2020 Search Engine Technology for Advanced Services 11

Metadata Unique id Core Metadata 03/10/2020 Search Engine Technology for Advanced Services 12

Rights management and act of privacy - Still substantial challenges concerning rights management in the digital domain. Ø Ø Ø 03/10/2020 Implementing EU’s copyright directive digitising digital document delivery act of privacy agreements taking care of right holders interests Search Engine Technology for Advanced Services 13

How do we get it all in ONE portal? - Least common denominator for metadata - Common identification and handling of digital objects - Consistent user interface (one or more approaches) - Method for generic searching Ø Harvesting metadata + search engine (OAI) Ø Distributed searching (Z 39. 50) 03/10/2020 Search Engine Technology for Advanced Services 14

Centralised index (OAI) metadata + text Interface Search engine indexing index OAI harvester OAI repository 03/10/2020 Digital long term repository Search Engine Technology for Advanced Services 15

Distributed seach (Z 39. 50/ZING) metadata Interface Query application Z 39. 50 client Z 39. 50 servers 03/10/2020 Digital long term repository Search Engine Technology for Advanced Services 16

Some examples - Digital radioarchive - Nordic web archive http: //nwa. nb. no - Ekofisk - BIBSYS ZSøk - The Norwegian digital library 03/10/2020 Search Engine Technology for Advanced Services 17

Digital radioarchive - Same service available for NRKs journalists, NLN’s employees and NLN’s users on-site - Radio programs from a specific region available at local libraries in this region - Service integrating data from nine different databases at NRK 03/10/2020 Search Engine Technology for Advanced Services 18

Nordic web archive - Tool to search in collected web archives - Full text queries in millons of web-pages - Multiple generations of web-pages - National and nordic - Open source 03/10/2020 Search Engine Technology for Advanced Services 19

Ekofisk - Philips Petroleum Norway, The Norwegian oilindustry museum, The National archive, The National library, Directorate for Cultural heritage. - Document the oil installation Ekofisk I - Web-service integrating data from seven databases at six institutions - Finishes in december 2004 03/10/2020 Search Engine Technology for Advanced Services 20

Wrap-up - User friendly portals increases use - The domains and borderlines of institutions are of little interest to the users. - Use many approaches -> adaptable user interfaces - Flexible search engine technology is a critical component! 03/10/2020 Search Engine Technology for Advanced Services 21

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The Norwegian digital library - Defining the architekture for The Norwegian digital library - Framework -> standards and basic services - Content and metadata - National standards! 03/10/2020 Search Engine Technology for Advanced Services 23

Point in time - Timeline - Requirement to metadata - Combining time, place and search 03/10/2020 Search Engine Technology for Advanced Services 24

Perspective? Global European Nordic National Regional Local 03/10/2020 Search Engine Technology for Advanced Services 25