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Theo van Veen, Koninklijke Bibliotheek

Metadata in the context of The European Library. Theo van Veen, Koninklijke Bibliotheek. Overview. Introduction and background Aspects of the work The metadata Overview of architecture Approach and state of the art review Analysis of functionality of metadata TEL metadata registry

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Theo van Veen, Koninklijke Bibliotheek

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  1. Metadata in the context of The European Library Theo van Veen, Koninklijke Bibliotheek

  2. Overview • Introduction and background • Aspects of the work • The metadata • Overview of architecture • Approach and state of the art review • Analysis of functionality of metadata • TEL metadata registry • Collections • Conclusions META-LIB workshop Frankfurt 21-22 October 2002

  3. Introduction • An “accompanying measure” created under auspices of CENL • Collaboration of national libraries of Finland, Germany, Italy, Netherlands, Portugal, Slovenia, Switzerland, United Kingdom and ICCU and CENL • Part funded by the European Commission for 30 months to test feasibility • If successful it is anticipated that other CENL members will participate META-LIB workshop Frankfurt 21-22 October 2002

  4. The Vision “.. discovery of and access to the collections, products and services of European National Libraries. ...aimed at users world-wide who want a powerful and easy way of finding European cultural resources. ...will display the richness and diversity of European culture through co-operation in innovation” • Rich and varied collections and trusted sources of reliable and high quality information • Unique to each country - enhanced by being united to display the cultural diversity of Europe • TEL aims to offer a single portal for search and access META-LIB workshop Frankfurt 21-22 October 2002

  5. What TEL is aiming at • User perspective • integrated access with central index • multi-lingual subject terms and name authorities • links to local services • Provider perspective • lower barrier to participate • simple protocols • facilitate conversions and addition of collections • Library perspective • common vocabulary with ongoing development • machine readable metadata sharing META-LIB workshop Frankfurt 21-22 October 2002

  6. The work packages 1 Publisher relations 2 Business models 3 Metadata 4 Interoperability testbeds 5 Dissemination and use 6 Management META-LIB workshop Frankfurt 21-22 October 2002

  7. XML MARC21 ONIX The metadata jungle MODS Functionality and services will be our target in the complex metadata world! RDF DC-Lib EAD METS UNIMARC META-LIB workshop Frankfurt 21-22 October 2002

  8. Potential TEL services • Interlinking national resources • Registry of all European heritage collections • Memory of Europe • Virtual collections (European wide) • Automatic translation of metadata, abstracts and publications • Timelines and geographical traveling though heritage collections Create TEL metadata infrastructure that makes it easy to add new services ! META-LIB workshop Frankfurt 21-22 October 2002

  9. Central index additional services OAI SRU DESCRIBING Link services TEL portal Z39.50 OpenURL TEL overview Object and collection descriptions Collections and objects META-LIB workshop Frankfurt 21-22 October 2002

  10. Highlights • Combination of distributed searching via Z39.50 and central indexing using: • The Open Archives Initiative protocol for metadata harvesting (OAI-PMH) • Search and Retrieve via URLs (SRU) • Integration with collection level descriptions • Metadata registry for controlled evolution of TEL application profile • User and context specific link services (OpenURL,URN) • Extra services: multilingual subject service (MACS project), name authorities service (LEAF project) and authentication META-LIB workshop Frankfurt 21-22 October 2002

  11. Search and Retrieve via URLs (SRU) • Initiative from Z39.50 implementers group • Low barrier implementation of server and client • Search via simple standard URL syntax • Human readable query language (CQL) • XML response conform standard schema in standard XML envelope • TEL test interface for SRU written as XSL stylesheet with some additional javascript giving it very powerful portal functionality META-LIB workshop Frankfurt 21-22 October 2002

  12. The metadata approach • State of art review • Use XML and DC-Library Application Profile as starting point for TEL metadata • Study of functionality: map metadata and functions • Create TEL application profiles for objects and for collection descriptions • Create TEL Metadata Registry for profile maintenance and portal functions • Create a TEL metadata handbook with guidelines META-LIB workshop Frankfurt 21-22 October 2002

  13. TEL realisation WOW! Analysis of functionality Realisation of testbeds TEL application profiles TEL metadata registry TEL integrated testbed State of art review META-LIB workshop Frankfurt 21-22 October 2002

  14. State of the art review • No consensus on terminology • Absence of a common bibliographic format • Need to share knowledge on metadata standards • Not yet one standard linking mechanism (URL, URN, PURL, dynamic links) • Uncertainty on the contents of TEL META-LIB workshop Frankfurt 21-22 October 2002

  15. Mapping metadata against functions functions • List all metadata elements in DC-Lib • List (all) possible functions • Check for each combination whether metadata are usable, needed or not relevant • Identify metadata elements that are missing or need special attention DC-Lib elements META-LIB workshop Frankfurt 21-22 October 2002

  16. search record retrieval identification description linking multilingual service thesaurus service collection level navigation authorisation administration software requirements copy cataloguing document ordering Functions and services Identification of original record (harvesting, linking by reference) Create TEL application profile(s) containing TEL specific metadata elements, but …. Base-url for dynamic generation of URLs for direct searching in collections. Collection description elements in general Metadata for linking by URN and OpenURL META-LIB workshop Frankfurt 21-22 October 2002

  17. TEL application profile • Specification of elements, definitions, rules, and namespaces • Specifications of characteristics like: • Type of obligation • Vocabularies • Elements taken from different namespaces: • DCES (Original 15 elements) • Dcterms (approved qualifiers) • DC-LMES (DC Library AP elements) • DC-ED (DC Educational AP elements) • MODS (LC MODS) • Collection Level Description elements • TEL (TEL specific elements) But .... to enable new functionality and to retain diversity and richness .... ... we need a mechanism for a controlled evolution of the application profile: the TEL Metadata Registry! META-LIB workshop Frankfurt 21-22 October 2002

  18. Purpose of registry • Create TEL application profiles • for object descriptions • for collection descriptions • for thesaurus records • Specify behaviour of TEL portal • portal functions and presentation • dynamic link generation • usage of services • search options • For data providers: • Expose TEL metadata requirements (e.g. conversions) • Offer a menu of existing metadata elements for the proposal of new elements • Creation of input forms META-LIB workshop Frankfurt 21-22 October 2002

  19. TEL Definitions • The TEL Application Profile contains characteristics on terms agreed by TEL for a specific types of descriptions to: • specify requirements to data providers • exchange information on these terms with the outside world to improve convergence • The TEL Metadata Registry is a single place to store data concerning metadata relevant to TEL (including proposed and rejected terms) combined with relevant tools. It is used for : • building application profiles • specify the portal behaviour • maintenance (controlled evolution) META-LIB workshop Frankfurt 21-22 October 2002

  20. TEL metadata registry Select entries approved for collection descriptions Input form / select collection description entries Specification of portal presentation TEL collection description profile Collection description editor TEL portal presentation Shared re-use of registry XML XSL XSL trans- formation output META-LIB workshop Frankfurt 21-22 October 2002

  21. Collection description form (D3.3) Elements from TEL application profile for collection level descriptions (based on RSLP) new data field Extract namespace prefixes from registry, perform checks, apply rules and generate collection level description in XML according to DCMI guidelines. Select new field META-LIB workshop Frankfurt 21-22 October 2002

  22. Usage of the registry/profile element properties Acceptance procedure collection provider The TEL metadata registry should improve harmonisation of metadata usage, but ... Add element collection registry Check elements Generate profile(s) Application profile ... the TEL metadata registry will be open for submission only for TEL participants! Specify conversions Meta- data Specify behavior Apply rules TEL portal META-LIB workshop Frankfurt 21-22 October 2002

  23. Collection description New collection Meta- data Enter new collection Acceptance procedure OAI CLDs TEL portal Central index META-LIB workshop Frankfurt 21-22 October 2002

  24. Object is target for new search Result list New result list Distributed search Collection hierarchy Confusing? But suppose your query matches collections. Do you want to miss those collections in your result list? collection collection collection collection collection object object object object object META-LIB workshop Frankfurt 21-22 October 2002

  25. query Name authorities query Translated subject Service request Improved query proposal Improved query proposal metadata query query Links to local services Metadata OpenURL Metadata and TEL services Central index Remote target Name authority service Remote target Local service TEL portal Local service Multi-lingual subject service Local ink service META-LIB workshop Frankfurt 21-22 October 2002

  26. META-LIB workshop Frankfurt 21-22 October 2002

  27. Conclusions • Although the current TEL project will not result in a fully operational European Library system, the results of the project will constitute the groundwork on which TEL’s ambitious vision can be realised. • TEL is is following the newest open standards like Dublin Core in XML, Application Profiles, OAI, SRU and OpenURL. • “TEL is undertaking pioneering work and should do research, make mistakes, redo and evolve !!!” More info: http://www.europeanlibrary.org META-LIB workshop Frankfurt 21-22 October 2002

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