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					Metadata Management
      Session:
      Formats
      Andy Powell & Brian Kelly
      UKOLN, University of Bath
                   a.powell@ukoln.ac.uk
                   b.kelly@ukoln.ac.uk


          http://www.ukoln.ac.uk/
UKOLN is funded by the British Library Research and Innovation Centre, the
  Joint Information Systems Committee of the Higher Education Funding
 Councils, as well as by project funding from the JISC’s Electronic Libraries
                    Programme and the European Union.
UKOLN also receives support from the University of Bath where it is based.
    What is the Dublin Core?
    •   15 element metadata set
    •   Resource discovery
    •   Web-based document-like objects
    •   Emphasis on semantics
    •   Widespread consensus
    •   Several syntaxes currently
    •   Set to become an early example of
        an RDF schema

2
    Dublin Core history...
    •   Workshop series - DC-1 to DC-5
    •   Email discussion list
    •   DC Policy Advisory Committee
    •   DC Technical Advisory Committee
    •   Series of 5 RFCs in preparation
    •   Submission to NISO (…ISO)



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    Dublin Core - elements
    15 element core metadata set

       •   Title            •   Format
       •   Subject          •   Identifier
       •   Description      •   Source
       •   Creator          •   Language
       •   Publisher        •   Relation
       •   Contributor      •   Coverage
       •   Date             •   Rights
       •   Type


4
    Qualified DC
    DC semantics are defined very broadly.
    Possible to:
      • refine the meaning of elements using ‘type’:
         – Relation TYPE=IsPartOf
      • associate value with externally defined ‘scheme’:
         – Subject SCHEME=LCSH
         – Date SCHEME=ISO 8601
      • indicate ‘language’ of value
         – Title LANGUAGE=en




5
    How is DC currently used?
    Embedded into HTML Web pages
      • <META> tag
      • limited functionality
         • no structure
      • version 4.0 support for SCHEMEs
      • syntax for qualified DC in <META> tags
        not well established




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    DC in HTML
    <HTML><HEAD>
    <TITLE>UKOLN Home Page</TITLE>
    <META NAME="DC.Title" CONTENT="UKOLN: UK Office for
    Library and Information Networking">
    <META NAME="DC.Subject" CONTENT="national centre,
    network information support, library community,
    awareness, research, information services, public
    library networking, bibliographic management,
    distributed library systems, metadata, resource
    discovery, conferences, lectures, workshops">
    <META NAME="DC.Description" CONTENT="UKOLN is a
    national centre for support in network information
    management in the library and information communities.
    It provides awareness, research and information
    services">
    <META NAME="DC.Creator" CONTENT=”UKOLN Information
    Services Group">
    </HEAD>
7   ...
    Admin Core
    Admin Core:
      • Administrative container metadata:
      • Defines a set of attributes for describing
        metadata
      • May be useful for describing data?
      • See <URL: http://metadata.net/admin/
        draft-iannella-admin-01.txt >




8
    Admin Core elements
    •   CreatorPersonal
    •   CreatorCorporate
    •   CreatorEmail
    •   CreatorContact
    •   DateCreated
    •   DateModified
    •   DateValidTo


9
    IMS
    Instructional Management Systems
    (IMS):
      • Defines metadata for educational
        resources
      • See UK Mirror at <URL:
        http://micros.hensa.ac.uk/
        mirrors/ims-project/>




1
0
    What is RDF?
    Resource Description Framework
    Input from various communities:
      •   Platform for Internet Content Selection (PICS)
      •   Web Collections (Site maps, MCF)
      •   Libraries, museums, archives (DC)
      •   Privacy (P3P)
    W3C Metadata Activity
      • Model and Syntax WG
      • Schema WG
    Interoperability of metadata
      • semantics, structure, syntax
1
1
    RDF - the model
                   PropertyType
       Resource                   Value



                    Property

    • Based on mathematical model
    • Arc-node diagrams
    • Web resources represented by nodes with
      URI
    • Collections of properties known as
      ‘descriptions’

1
2
    RDF - simple example

                                        Author
     http://www.ukoln.ac.uk/metadata/            Andy Powell




    or, in plain English…

       “Andy Powell is the author of the
       resource identified by
       http://www.ukoln.ac.uk/metadata/”

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3
     DC in RDF
                                          DC:Title    The UKOLN
       http://www.ukoln.ac.uk/metadata/              Metadata Home
                                                         Page


    <?xml:namespace ns="http://www.w3.org/TR/WD-rdf/"
    prefix=”RDF"?>
    <?xml:namespace
    ns="http://purl.org/dublin_core/schema/" prefix=”DC"?>

    <RDF:RDF>
      <RDF:Description
       RDF:HREF=”http://www.ukoln.ac.uk/metadata/”>
        <DC:Title>The UKOLN Metadata Home Page</DC:Title>
      </RDF:Description>
    </RDF:RDF>


1
4
    Dublin Core - RDF Example
    <?xml:namespace href="http://www.w3c.org/RDF/" as="RDF"?>
    <?xml:namespace href="http://purl.oclc.org/RDF/DC/" as="DC"?>
    <RDF:RDF>
     <RDF:Description RDF:HREF="http://www.ukoln.ac.uk/">
      <DC:Title>UKOLN: UK Office for Library and Information Networking</DC:Title>
      <DC:Creator>UKOLN Information Services Group</DC:Creator>
      <DC:Subject>
       national centre, network information support, library
       community, awareness, research, information services,
       public library networking, bibliographic management,
       distributed library systems, metadata, resource discovery,
       conferences, lectures, workshops
      </DC:Subject>
      <DC:Description>
       UKOLN is a national centre for support in network
       information management in the library and information
       communities. It provides awareness, research and
       information services
      </DC:Description>
      </RDF:Description>
    </RDF:RDF>
1
5
    RDF - current status
    • Some support for RDF in Mozilla
      (Netscape source code release)
    • RDF toolkits under development
    • Several RDF editors available, e.g.
       • DC-dot, UKOLN
       • Reggie, DSTC
    • http://www.ukoln.ac.uk/metadata/dcdot/
    • http://metadata.net/dstc/

    • W3C Syntax and Schema drafts still
      undergoing development
1   • http://www.w3.org/RDF/
6

				
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