Presentation Transcript
Dublin Core as a tool for interoperabilityCommon presentation of data from archives, libraries and museumsDC-2006 - 4 October 2006 :Dublin Core as a tool for interoperabilityCommon presentation of data from archives, libraries and museumsDC-2006 - 4 October 2006 Leif Andresen
Danish National Library Authority
The speaker :Leif Andresen - DC-2006 Slide 2 The speaker Leif Andresen
Library Advisory Officer
Danish National Library Authority
Chair Danish Standards S24 - Information and Documentation (Mirror committee ISO TC46)
ISO TC46/SC4 Technical Interoperability
Chair DCMI Standards
Member Danish ALM standard WG
Presentation :Leif Andresen - DC-2006 Slide 3 Presentation Introduction
ABM standard working group
2003 report
2006 report
Common content format
National addition: dkdcplus
XML schema
How to transport DC records
Conclusion
Introduction :Leif Andresen - DC-2006 Slide 4 Introduction In 2003 the Danish Ministry of Culture entrusted the three national authorities:
Danish State Archives
Danish National Library Authority
National Cultural Heritage Agency
to develop recommendations for data content, data formats and data transport to facilitate presentation of joint information from archive, library and museum sectors
ABM standard working group :Leif Andresen - DC-2006 Slide 5 ABM standard working group Steering group: the heads of A, L and M national authorities
Working group members:
Danish State Archives
City archives of Aalborg
Danish National Library Authority
State and University Library Aarhus
National Cultural Heritage Agency (2)
First report (2003) :Leif Andresen - DC-2006 Slide 6 First report (2003) Point out Dublin Core as basis for interoperability - the WG don’t find alternatives
Drafts for mapping between sector specific formats and Dublin Core
Mapping cause loss of data
Recommend XML and work out mapping
Refine requirements :Leif Andresen - DC-2006 Slide 7 Refine requirements Only data relevant to the public for search and presentation to be converted
No need for all details in a common database
Important to get a pointer (a link) to the original database
No duplication of functionality, e.g. requests of library holdings - but links
Final report 2006 :Leif Andresen - DC-2006 Slide 8 Final report 2006 Based on first report
Involvement of consultants from The Royal School of Library and Information Science and the company Index Data
Complete mappings
Develop XML schema
Staring point :Leif Andresen - DC-2006 Slide 9 Staring point Mapping from the ALM-formats should point to one of the fifteen basic Dublin Core elements if possible
Refinements of Dublin Core should only be used if absolutely necessary
Other metadata formats should only be used if absolutely necessary
New additional Danish metadata elements should be the last option
Conditions :Leif Andresen - DC-2006 Slide 10 Conditions Different traditions in sectors
Different registrations levels
Collections with no details about the units
Relation versus record databases
Only libraries and local archives on document/unit level
Mappings :Leif Andresen - DC-2006 Slide 11 Mappings Developed mappings from four sector
specific formats:
Daisy for governmental archives
Arkibas 4 for local archives
danMARC2 for libraries
Regin for museums
Dissimilarity for DC Creator :Leif Andresen - DC-2006 Slide 12 Dissimilarity for DC Creator Museum: person responsible for composition of museums file
Library: Author, composer etc.
Archive: institution or part of institution who established the archive
So: some additional information needed to ensure informative presentation
Dissimilarity for DC Title :Leif Andresen - DC-2006 Slide 13 Dissimilarity for DC Title Museum: constructed - normally not titles in source system
Library: mandatory
Archive: constructed - normally not titles in source system
Common content format :Leif Andresen - DC-2006 Slide 14 Common content format The dkabm format consists of:
dc: Dublin Core 15 basic elements
dcterms: Dublin Core refinements
ac: Administrative Components
dkdcplus: Danish additions
Both general and specific :Leif Andresen - DC-2006 Slide 15 Both general and specific dkabm include guidelines for how to map to metadata elements
not all elements in dc, dcterms and ac are used
but no elements are excluded:
the format is for broader use in the A, L and M sectors
in library sector a extend profile is planed
dc: Dublin Core 15 basic elements :Leif Andresen - DC-2006 Slide 16 dc: Dublin Core 15 basic elements Title
Creator
Subject
Description
Publisher
Contributor
Date Type
Format
Identifier
Source
Language
Relation
Coverage
Rights
dcterms: Dublin Core refinements :Leif Andresen - DC-2006 Slide 17 dcterms: Dublin Core refinements Used are:
Alternative (Title)
Extent and Medium (Format)
isPartOf and HasPart (Relation)
Spatial and Temporal (Coverage)
ac: Administrative Components :Leif Andresen - DC-2006 Slide 18 ac: Administrative Components Metadata about metadata needed to describe the source
Metadata about metadata outside the scope of Dublin Core
AC Identifier: Identification in original system for linking
AC Source: Identify the delivering organisation/institution
dkdcplus: Danish additions :Leif Andresen - DC-2006 Slide 19 dkdcplus: Danish additions Elements:
preferredName (Creator)
alternativeName (Creator)
actPeriod (Creator) with scheme Period
version (Description)
Schemes:
SubjectType (Subject)
Danish translation DCMI Type (Type)
dkdcplus: Version :Leif Andresen - DC-2006 Slide 20 dkdcplus: Version Version is the only general refinement
hasVersion (Relation) is not useable: Definition is “A reference to a related resource”
Many application profiles have version, edition or synonymous elements
the IFLA metadata report is consulted http://www.ifla.org/VII/s13/guide/metaguide03.pdf
Comparison IFLA metadata and DC :Leif Andresen - DC-2006 Slide 21 Comparison IFLA metadata and DC
The combined schema (1) :Leif Andresen - DC-2006 Slide 22 The combined schema (1)
The combined schema (2) :Leif Andresen - DC-2006 Slide 23 The combined schema (2)
Survey of XML schemas (1) :Leif Andresen - DC-2006 Slide 24 Survey of XML schemas (1) dkabm.xsd: collecting schemas below
dc.xsd: 15 basic Dublin Core elements
ac.xsd: Administrative Components
dkdcplus.xsd: defines Danish elements and subject lists
dcterms_ext.xsd: import Danish elements from dkdcplus.xsd together with dcterms and dc
Survey of XML schemas (2) :Leif Andresen - DC-2006 Slide 25 Survey of XML schemas (2) dcterms.xsd: defines Dublin Core refinements
dcmitype.xsd: defines Dublin Core resource types
dktype.xsd: defines Danish language of DCMI types
ISO639-2.xsd: defines valid language codes
dkabm XML schema :Leif Andresen - DC-2006 Slide 26 dkabm XML schema
Extract of dkdcplus XML schema :Leif Andresen - DC-2006 Slide 27 Extract of dkdcplus XML schema
Transport of metadata records :Leif Andresen - DC-2006 Slide 28 Transport of metadata records Harvesting
OAI-PMH
Search and retrieve
SRU
File transport
National guidelines
Harvesting with OAI-PMH :Leif Andresen - DC-2006 Slide 29 Harvesting with OAI-PMH
[DKABM-record]
[DKABM-record]
Search and retrieve with SRU :Leif Andresen - DC-2006 Slide 30 Search and retrieve with SRU
[DKABM-record]
[DKABM-record]
File transport (national/local model) :Leif Andresen - DC-2006 Slide 31 File transport (national/local model)
[DKABM-record]
[DKABM-record]
Conclusion (1) :Leif Andresen - DC-2006 Slide 32 Conclusion (1) Dublin Core has three different roles in
practical work:
the original: a simple schema to register Internet documents
the extended: as basis for project and domain specific registration schemas
interoperability: as basis for interchange of information between domains
Conclusion (2) :Leif Andresen - DC-2006 Slide 33 Conclusion (2) This paper shows a way to use Dublin Core for interoperability between three related sectors.
Arguably the sectors are related but with major differences.
This indicates that Dublin Core has a more general role as carrier for interoperability.
Contact :Leif Andresen - DC-2006 Slide 34 Contact Leif Andresen
Danish National Library Authority
lea@bs.dk
Report:
http://www.kulturarv.dk/tjenester/publikationer/emneopdelt/kulturarv-it/abm2006/index.jsp