Post on 20-Jan-2016
description
Theo van Veen, Koninklijke Bibliotheek
Metadata in the context of The European Library
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• 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
Overview
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• 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
Introduction
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• 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
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”
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• 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
What TEL is aiming at
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1 Publisher relations
2 Business models
3 Metadata
4 Interoperability testbeds
5 Dissemination and use
6 Management
The work packages
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The metadata jungle
Functionality and serviceswill be our target in the complex metadata world!
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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 thatmakes it easy toadd new services !
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TEL overviewObject and collection
descriptions Collections and objects
TEL portal
Z39.50
additional services
Link service
s
OpenURL
OAISRU
Central index
DESCRIBING
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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
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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
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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
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TEL realisation
time
fun
cti
on
ali
ty *
co
nte
nts
metadata infrastructure (%)
Operational service
Sta
te o
f art
revi
ew
Ana
lysi
s of
func
tiona
lity
Rea
lisat
ion
of te
stbe
ds
TEL
appl
icat
ion
prof
iles
TEL
met
adat
a re
gist
ry
TEL
inte
grat
ed te
stbe
d
WOW!
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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
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Mapping metadata against 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 D
C-L
ib e
lem
ents
functions
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Functions and services
• search
• record retrieval
• identification
• description
• linking
• multilingual service
• thesaurus service
• collection level
• navigation
• authorisation
• administration
• software requirements
• copy cataloguing
• document ordering
Identification of originalrecord (harvesting, linking by reference)
Metadata for linking by URN and OpenURL
Collection descriptionelements in general
Base-url for dynamic generation of URLsfor direct searching incollections.
Create TEL application profile(s)containing TEL specific metadataelements, but ….
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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 functionalityand to retain diversity and richness ....
... we need a mechanism for a controlled evolution of the application profile: the TEL Metadata Registry!
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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
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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)
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Shared re-use of registry
XML XSL
output
XSL trans-
formation
TEL metadata registry
Select entries approved for
collection descriptions
TEL collection description profile
Input form / select collection
description entries
Collection description editor
Specification of portal presentation
TEL portal presentation
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Collection description form (D3.3)
Select new field
Elements from TEL application profile for collection level descriptions (based on RSLP)
new
data
fieldExtract namespace prefixes from registry, perform checks, apply rules and generate collection level description in XML according to DCMI guidelines.
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Usage of the registry/profile
registry
TEL portal
Acceptance
procedure
collection
element properties
collection provider
Add element
Specify behavior Meta- data
Application profile
Generate profile(s)
Specify conversions
Check elements
Apply rules
... the TEL metadata registrywill be open for submission only for TEL participants!
The TEL metadata registryshould improve harmonisationof metadata usage, but ...
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Enter new collection
OAI
CLDs
TEL portal
Central index
Acceptance
procedure
Collection description
Meta- data
New collection
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collection
collection
collectioncollectioncollection
objectobject
object object object
Distributed search
Result listObject is target for new search
New result list
Collection hierarchy
Confusing?
But suppose your query matches collections.
Do you want to miss those collections in your result list?
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Metadata and TEL services
Multi-lingual subject service
Remote target
TEL portal
Central index
Local ink service
Name authority service
Local service
Metadata OpenURL
Local service
Service request
query
Translated subjectImproved
query proposal
Name authorities
query
query
Links to local services
Remote target
metadata
query
Improved query
proposal
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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