dc:TitleDC and RDF Status and Futuredc:Title

1
ltdcTitlegtDC and RDF Status and Futurelt/dcTitlegt

• Andy Powell lta.powell_at_ukoln.ac.ukgt
• UKOLN
• University of Bath
• http//www.ukoln.ac.uk/metadata/

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
JISCs Electronic Libraries Programme and the
European Union. UKOLN also receives support
from the University of Bath where it is based.
2
Overview

• Dublin Core - current status
• the aftermath of DC-6
• DC Datamodel and RDF
• examples of simple DC
• what is qualification
• examples of qualified DC
• Dublin Core - futures
• DC version road-map
• standardisation

3
DC-6 and beyond

• Dublin Core lt-gt rights owners
• DC-Datamodel Working Group
• 11 and DC.Agent discussion
• DC semantics
• RFC 2413
• Element Working Groups
• review of RFC 2413 definitions
• qualifiers
• HTML syntax Internet Draft (in progress)

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DC lt-gt rights owners

• INDECS - EC project looking at metadata for
• rights management
• electronic commerce
• DOI - Digital Object Identifier
• defining metadata associated with DOIs
• Godfrey Rust D-Lib article prior to DC-6
  indicating DC problem areas
• DC - INDECS - DOI meeting at DC-6
• INDECS presentation at DC-6

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DC - INDECS problem areas

• Creator/Contributor/Publisher
• Publisher too loosely defined
• Rights too vague
• Relation/Source problems
• Values not tightly specified
• No notion of event
• Lack of conceptual data-model
• e.g. no underlying notion of work
• Note many of these already understood by the DC
  community!

6
What is happening?

• Schema WG
• DC - INDECS - IFLA FRBR
• Statement expected on dc-general soon
• Does this change the DC 15?
• possibly - but we don't know for sure yet!
• change to the 15 may be happening anyway, e.g.
  Creator, Contributor, Publisher

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DC-Datamodel WG

• Note not a conceptual data-model
• Defining syntax for representing DC in RDF
• Investigating qualified DC (QDC)
• What is qualification?
• Defining syntax for QDC in RDF
• Feeding this back into DC in HTML syntax

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RDF - the model
Resource
Property
Value
Statement

• simple, triple-based model
• arc-node diagrams
• 2 XML syntaxes
• Resource is anything with a URI
• Property typically within a namespace
• Value can be atomic (string or number) or
  complex set of statements

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DC-RDF - Creator, ...
ltMETA NAME"DC.Creator" CONTENT van der Werf,
Titia"gt
http//www.konbib.nl/donor/
dcCreator
van der Werf, Titia

• Titia van der Werf is the Creator of the
  resource identified by http//www.konbib.nl/donor/
  (where Creator is as defined within the dc
  namespace

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, Language, Type, Title, ...
ltMETA NAME"DC.Language" CONTENTnl"gt ltMETA
NAME"DC.Type" CONTENTText"gt ltMETA
NAME"DC.Type" CONTENTHomepage"gt ltMETA
NAME"DC.Title" CONTENTDONOR Homepage"gt
nl
dcLanguage
dcType
Text
http//www.konbib.nl/donor/
Homepage
dcType
dcTitle
DONOR Homepage
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, Identifier
ltMETA NAME"DC.Identifier" CONTENThttp//www.kon
bib.nl/donor/"gt
http//www.konbib.nl/donor/
ltMETA NAME"DC.Identifier" CONTENT1-56592-149-6"
gt
http//www.konbib.nl/donor/
dcIdentifier
1-56592-149-6
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DC-RDF-XML
lt?xml version"1.0"?gt ltrdfRDF
xmlnsrdf"http//www.w3.org/1999/02/22-rdf-syntax
-ns" xmlnsdc"http//purl.org/dc/elements/1.
0/"gt ltrdfDescription about"http//www.konbib
.nl/donor/gt ltdcTitlegt DONOR
Homepage lt/dcTitlegt
ltdcCreatorgt van der Werf, Titia
lt/dcCreatorgt ltdcTypegtTextlt/dcTypegt
ltdcTypegtHomepagelt/dcTypegt
ltdcLanguagegt nl
lt/dcLanguagegt lt/rdfDescriptiongt lt/rdfRDFgt
Note could use Alt, Bag or Seq for repetition
here.
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DC-RDF-XML in HTML !

• Cant embed standard RDF-XML syntax because
  content not hidden
• Embed using abbreviated syntax
• Embed at end of HTML ltHEADgt section
• If this isnt possible ltLINKgt to external RDF
  file, e.g.

ltLINK rel"meta" href"mydocMetadata.dc.rdf"gt
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Abbreviated syntax
ltrdfRDF xmlnsrdf"http//www.w3.org/1999/02/
22-rdf-syntax-ns" xmlnsdc"http//purl.org/d
c/elements/1.0/"gt ltrdfDescription
about"http//www.konbib.nl/donor/"
dcTitle"DONOR Homepage" dcCreator"van
der Werf, Titia" dcType"Text"
dcLanguage"nl" /gt lt/rdfRDFgt
Example of element repetition embedded
in http//www.ukoln.ac.uk/metadata/
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Qualified DC - current

• Messy terminology
• qualifiers, sub-elements, types, schemes,
  DC-Simple, DC-Qualified, QDC, DC-1.0, DC-1.1,
  DC-2.0
• Currently have
• TYPE (sub-element?)
• SCHEME
• LANG

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Qualified DC in HTML 4.0
ltMETA NAME"DC.Creator.PersonalName"
CONTENT"Jager, Wim de"gt ltMETA NAME"DC.Coverage.P
laceName" CONTENT"Jorwerd"gt ltMETA
NAME"DC.Language" SCHEME"ISO639-1"
CONTENT"en"gt ltMETA NAME"DC.Identifier"
SCHEME"ISBN" CONTENT" 1565921496"gt ltMETA
NAME"DC.Date" SCHEME"ISO8601"
CONTENT"1998-09-03"gt ltMETA NAME"DC.Type"
LANG"en" CONTENTText"gt
Examples from DONOR Dublin Core HTML Metatag
Syntax
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What is qualification?

• DC-Datamodel WG have identified three kinds of
  qualification
• element qualifiers (TYPE)
• value qualifiers (SCHEME)
• value components
• ...and two associated constructs
• grouping and sequencing constructs offered by RDF
  (Alt, Bag and Seq)
• language (LANG) handled by RDF-XML

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Element qualifier
ltMETA NAME"DC.Coverage.PlaceName"
CONTENT"Jorwerd"gt
http//home.worldonline.nl/jordijk
dcCoverage
Jorwerd
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Element qualifier
ltMETA NAME"DC.Coverage.PlaceName"
CONTENT"Jorwerd"gt
http//home.worldonline.nl/jordijk
dcCoverage
rdfvalue
Jorwerd
Structural Node
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Element qualifier
ltMETA NAME"DC.Coverage.PlaceName"
CONTENT"Jorwerd"gt
http//home.worldonline.nl/jordijk
dcCoverage
rdfvalue
Jorwerd
dcqCoverageType
http//purl.org/dcq/1.0/.../PlaceName
URL still under discussion but possibly http//pu
rl.org/dc/vocabularies/CoverageTypes/v1.0/PlaceNam
e
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Element Qualifier (2)
ltMETA NAME"DC.Coverage.PlaceName"
CONTENT"Jorwerd"gt
lt?xml version"1.0"?gt ltrdfRDF
xmlnsrdf"http//www.w3.org/1999/02/22-rdf-syntax
-ns" xmlnsdc"http//purl.org/dc/elements/1.
0/ xmlnsdcqhttp//purl.org/dc/qualifiers/1
.0/gt ltrdfDescription about"http//www.konbi
b.nl/donor/gt ltdcCoveragegt
ltrdfDescriptiongt
ltdcqCoverageType
rdfresourcehttp//purl.org/dc/.../PlaceName
/gt ltrdfvaluegtJorwerdlt/rdfvaluegt
lt/rdfDescriptiongt
lt/dcCoveragegt lt/rdfDescriptiongt lt/rdfRDFgt
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Value qualifier
ltMETA NAME"DC.Date" SCHEME"ISO8601"
CONTENT"1998-09-03"gt
http//www.konbib.nl/donor/
dcDate
1998-09-03
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Value qualifier
ltMETA NAME"DC.Date" SCHEME"ISO8601"
CONTENT"1998-09-03"gt
http//www.konbib.nl/donor/
dcDate
rdfvalue
1998-09-03
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Value qualifier
ltMETA NAME"DC.Date" SCHEME"ISO8601"
CONTENT"1998-09-03"gt
http//www.konbib.nl/donor/
dcDate
rdfvalue
1998-09-03
dcqScheme
http//www.w3.org/TR/NOTE-datetime
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Value Qualifier (2)
ltMETA NAME"DC.Date" SCHEME"ISO8601"
CONTENT"1998-09-03"gt
lt?xml version"1.0"?gt ltrdfRDF
xmlnsrdf"http//www.w3.org/1999/02/22-rdf-syntax
-ns" xmlnsdc"http//purl.org/dc/elements/1.
0/ xmlnsdcqhttp//purl.org/dc/qualifiers/1
.0/gt ltrdfDescription about"http//www.konbi
b.nl/donor/gt ltdcDategt
ltrdfDescriptiongt
ltdcqDateScheme
rdfresourcehttp//www.w3.org/TR/NOTE-datetime
/gt ltrdfvaluegt1998-09-03lt/rdfvalu
egt lt/rdfDescriptiongt
lt/dcDategt lt/rdfDescriptiongt lt/rdfRDFgt
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DC-RDF qualifier template
Resource
dcElement
rdfvalue
Value
dcqScheme
dcqElementType (dcqAgentRole)
Scheme URI
Type URI
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Value component
ltMETA NAME"DC.Creator.PersonalName"
CONTENT"Jager, Wim de"gt
http//www.konbib.nl/donor/
dcCreator
vcardFN
Jager, Wim de
vcardEMAIL
wdj_at_somewhere.nl
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Value component
ltMETA NAME"DC.Creator.PersonalName"
CONTENT"Jager, Wim de"gt
http//purl.org/dc//Person
rdftype
http//www.konbib.nl/donor/
dcCreator
vcardFN
Jager, Wim de
vcardEMAIL
wdj_at_somewhere.nl
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Value component (2)
ltMETA NAME"DC.Creator.PersonalName"
CONTENT"Jager, Wim de"gt
lt?xml version"1.0"?gt ltrdfRDF
xmlnsrdf"http//www.w3.org/1999/02/22-rdf-syntax
-ns xmlnsvcardhttp//imc.org/vCard/3.0
xmlnsdc"http//purl.org/dc/elements/1.0/"gt
ltrdfDescription about"http//www.konbib.nl/do
nor/gt ltdcCreatorgt
ltrdfDescriptiongt ltrdftype
rdfresourcehttp//purl.org/dc//Person /gt
ltvcardFNgtJager, Wim delt/vcardFNgt
ltvcardEMAILgtwdj_at_somewhere.nllt/vcard
EMAILgt lt/rdfDescriptiongt
lt/dcCreatorgt lt/rdfDescriptiongt lt/rdfRDFgt
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Language
ltMETA NAME"DC.Type" LANG"en" CONTENTText"gt
lt?xml version"1.0"?gt ltrdfRDF
xmlnsrdf"http//www.w3.org/1999/02/22-rdf-syntax
-ns" xmlnsdc"http//purl.org/dc/elements/1.
0/"gt ltrdfDescription about"http//www.konbib
.nl/donor/gt ltdcType xmllang"en"gt
Text lt/dcTypegt
lt/rdfDescriptiongt lt/rdfRDFgt
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DC - Roadmap

• Updated RFC 2413
• DC 1.1
• 15 elements!
• Internet draft - syntax in HTML
• QDC 1.0 - semantics of qualified DC
• Internet draft (?) - syntax in RDF (based on
  DC-Datamodel WG)
• DC 2.0
• DC/DOI/INDECS schema alignment
• may not be 15 elements

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DC versioning...

• NISO, ISO and CEN standardisation (likely to be
  based on semantics in DC 1.1)

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Questions...
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References

• Resource Description Framework (RDF) Model and
  Syntax Specificationhttp//www.w3.org/TR/REC-rdf-
  syntax/
• DC Working Groupshttp//purl.org/dc/groups/
• DC-Datamodel homehttp//www.mailbase.ac.uk/lists/
  dc-datamodel/
• DC-Datamodel list of decisionshttp//www.mailbase
  .ac.uk/lists/dc-datamodel/files/decisions.html
• INDECShttp//www.indecs.org/
• Digital Object Identifierhttp//www.doi.org/
• DC-dothttp//www.ukoln.ac.uk/metadata/dc-dot/
• Reggiehttp//metadata.net
• SiRPAChttp//www.w3.org/RDF/Implementations/SiRPA
  C/http//www.ukoln.ac.uk/metadata/resources/rdf/p
  arser/
• Representing vCard v3.0 in RDFhttp//www.dstc.edu
  .au/RDU/RDF/draft-iannella-vcard-rdf-00.txt