University of Illinois at Urbana-Champaign XML Metadata - PowerPoint PPT Presentation

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University of Illinois at Urbana-Champaign XML Metadata

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OAI Metadata -- Univ. of Illinois at UC. 2. XML Namespaces ... 9. RDF, DC, DCQ, et al. Together. Simple Examples. Complex Example. RDF Visualizer ... – PowerPoint PPT presentation

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Title: University of Illinois at Urbana-Champaign XML Metadata


1
University of Illinois at Urbana-Champaign XML
Metadata
  • Thomas G. Habing thabing_at_uiuc.eduTimot
    hy W. Cole t-cole3_at_uiuc.edu
  • Grainger Engineering Library Information Center
  • 30 March 2001
  • http//dli.grainger.uiuc.edu/Publications/TWCole/
    LIT_OAIAlpha/

2
XML Namespaces
  • Namespaces http//www.w3.org/TR/REC-xml-names/
  • ltprefixtagname xmlnsprefixhttp//some.urigt
  • Namespace prefix is an arbitrary string
  • Namespace URI is what is significant
  • Default namespaces
  • lttagname xmlnshttp//some.orggt
  • SHOW EXAMPLES
  • Namespace URI is not related to schema validation

3
Dublin Core
  • DC http//purl.org/dc/documents/rec-dces-19990702.
    htm
  • Dublin Core Resource Discovery
  • Assigns Meaning to 15 ElementsTitle Creator Da
    teSubject Publisher FormatDescription Contribu
    tor IdentifierType Rights LanguageSource Rela
    tion Coverage

4
Dublin Core (cont.)
  • Usage is not always clear
  • Many mapping efforts underway
  • MARC ? DC http//128.253.121.110/NSDLmetaWG/MARCto
    DC.htm
  • FGDC ? DC http//eeirc.nwrc.gov/pubs/crosswalk/dc7
    casestudy.htm
  • EAD ? DC
  • RFC1807 (Dienst) ? DC

5
oai_dc Metadata Format
  • http//www.openarchives.org/OAI/dc.xsd
  • http//bolder.grainger.uiuc.edu/oaisimple/oai.asp?
    verbGetRecordidentifieroaiuiuc184500metadata
    Prefixoai_dc

6
Dublin Core Qualified
  • DCQ http//purl.org/dc/documents/rec/dcmes-qualifi
    ers-20000711.htm
  • Dublin Core Qualifiers Improved Discovery
  • Element Refinements
  • Date Created, Valid, Available, Issued, Modified
  • Element Encoding Schemes
  • Date DCMI Period, W3C-DTF
  • Authoritative Encoding in XML Still TBD

7
uiuc_dcq Metadata Format
  • http//bolder.grainger.uiuc.edu/oaisimple/uiuc_dcq
    .xsd
  • http//bolder.grainger.uiuc.edu/oaisimple/oai.asp?
    verbGetRecordidentifieroaiuiuc184500metadata
    Prefixuiuc_dcq

8
Resource Description Framework
  • RDF http//www.w3.org/TR/REC-rdf-syntax/
  • Resource Description Framework
  • interoperability between applications that
    exchange machine-understandable information
  • Statements about the properties of resources
  • Statements about statements
  • Containers bag, seq, alt
  • Using RDF, DC, and DCQ together (dated)
  • http//www.ukoln.ac.uk/metadata/resources/dc/datam
    odel/WD-dc-rdf/

9
RDF, DC, DCQ, et al. Together
  • Simple Examples
  • Complex Example
  • RDF Visualizer
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