pwc schemas forum for metadata schema implementers the schemas project and metadata etb workshop,...
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PwC
SCHEMASForum for metadata schema implementers
The SCHEMAS project and metadata
ETB Workshop, London, 9-10 January 2001
Michael Day, [email protected]
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Contents
Project overview– Audience, needs, SCHEMAS project
offerings, some results to date
The SCHEMAS metadata registry– Objectives, approaches, implementation and
functions
Application profiles– Some definitions
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Partners
PricewaterhouseCoopers Technology Consultants (PwC)
German National Research Centre for Information Technology (GMD)
UK Office for Library and Information Networking, University of Bath (UKOLN)
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Audience
Who?– Metadata schema designers– Projects under the EU’s IST programme
(Multimedia Content and Tools) and national initiatives
What for?– Information, guidance and tools for the
description of Web resources of all kinds– Helping designers to use what is already
there
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Domains
Industry Publishing and rights
management Audio-visual production
and distribution Cultural heritage
Education
Research
Academic services
Geospatial information
Other (e.g. Government)
Not just Dublin Core
No ‘best way’ of doing things
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Needs
General need for:– Standard methods for content description– Multiplicity of schemas, mixing and matching
general and specific sets
But:– There is some duplication of effort,
competition between standards and schemas– Potential confusion for implementers
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Re-use
Why re-use existing schemas?– Not re-inventing wheels– Potential use of standard tools– Higher potential interoperability
End result:– Reduction of cost, now and in the future– Enlarging the potential audience– Interoperability
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The information gap
Metadata schemas already identified:– Over 200 implementation activities– Around 90 standardisation activities– Very different levels of information
Conclusions:– Good information about schemas is badly
needed– Need for mutual understanding, hopefully
leading to harmonisation
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SCHEMAS provides ...
Information provision– Metadata Watch Reports– Standards Framework Reports– Guidance material
Workshops
Registry implementation– Schemas, application profiles, people,
projects, standards, tools, guidelines
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SCHEMAS results
First Workshop (Bath, June 2000) - reporthttp://www.schemas-forum.org/workshops/
Metadata Watch Reports: #1 (July 2000), #2 (September 2000), #3 (November 2000)http://www.schemas-forum.org/metadata-watch/
Standards Framework Report: #1 (Sept. 2000)http://www.schemas-forum.org/stds-framework/
Second Workshop (Bonn, November 2000)
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SCHEMAS Registry
Experience with prototype registry developed by DESIRE II project
The registry is the place to publish metadata schemas:
– ‘namespace schemas’– ‘application profile schemas’
As well as other information about schemas, e.g.:– standards, projects, people, tools, etc.
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Thick registry
ThickRegistry
Namespaceschema App
profile
Sampledata
Mapping
Usageguide
Software tools
Users
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Thin registry
Thin Registry
Namespaceschema App
profile
Sampledata
Mapping
Usageguide
Software tools Users
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Registry approach
The SCHEMAS registry will be:– a ‘thick registry’ initially, with schemas
registered at a central location– develop into a ‘thin registry’ in the future, with
pointers to schemas on the Web
The technical basis will be:– RDF Schemas– EOR toolkit
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EOR Toolkit
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Registry functions
Registration– schemas from European projects and
initiatives – information and reviews from SCHEMAS
domain correspondents
Searching– Finding application profiles for re-use– Finding information and guidance
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Application profiles
What is an application profile?– a schema identifying the use of elements
from one or more namespaces in a particular application, with additional constraints
What is it used for?– To publish this information for a human
audience– To help software configure
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Profile process
Common steps in defining profile– identify requirements for descriptive elements– find appropriate standard– link required elements to standard elements
where possible– define remaining elements and/or qualifiers in
private namespace– link remaining elements
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Contacts
Makx [email protected]
Rachel [email protected]
Web site:
http://www.schemas-forum.org/
PwC
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Acknowledgements
Based on a presentation given by Makx Dekkers (PricewaterhouseCoopers) at the MALVINE and LEAF conference: Gateways to Europe’s Cultural Heritage,
Staatsbibliothek zu Berlin, 4-5 December 2000.
http://www.sbb.spk-berlin.de/malvine/agenda/schemas.html