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University of Illinois at Urbana-Champaign XML Metadata

University of Illinois at Urbana-Champaign XML Metadata. Thomas G. Habing thabing@uiuc.edu Timothy W. Cole t-cole3@uiuc.edu Grainger Engineering Library Information Center 30 March 2001 http://dli.grainger.uiuc.edu/Publications/TWCole/ LIT_OAIAlpha/. XML Namespaces.

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University of Illinois at Urbana-Champaign XML Metadata

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  1. University of Illinois at Urbana-ChampaignXML Metadata Thomas G. Habingthabing@uiuc.eduTimothy W. Colet-cole3@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/ • <prefix:tagname xmlns:prefix=“http://some.uri”> • Namespace prefix is an arbitrary string • Namespace URI is what is significant • Default namespaces: • <tagname xmlns=“http://some.org”> • SHOW EXAMPLES • Namespace URI is not related to schema validation OAI Metadata -- Univ. of Illinois at UC

  3. Dublin Core • DC http://purl.org/dc/documents/rec-dces-19990702.htm • Dublin Core = Resource Discovery • Assigns Meaning to 15 Elements:Title Creator DateSubject Publisher FormatDescription Contributor IdentifierType Rights LanguageSource Relation Coverage OAI Metadata -- Univ. of Illinois at UC

  4. Dublin Core (cont.) • Usage is not always clear • Many mapping efforts underway • MARC  DC http://128.253.121.110/NSDLmetaWG/MARCtoDC.htm • FGDC  DC http://eeirc.nwrc.gov/pubs/crosswalk/dc7casestudy.htm • EAD  DC • RFC1807 (Dienst)  DC OAI Metadata -- Univ. of Illinois at UC

  5. oai_dc Metadata Format • http://www.openarchives.org/OAI/dc.xsd • http://bolder.grainger.uiuc.edu/oaisimple/oai.asp?verb=GetRecord&identifier=oai:uiuc:184500&metadataPrefix=oai_dc OAI Metadata -- Univ. of Illinois at UC

  6. Dublin Core Qualified • DCQ http://purl.org/dc/documents/rec/dcmes-qualifiers-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 OAI Metadata -- Univ. of Illinois at UC

  7. uiuc_dcq Metadata Format • http://bolder.grainger.uiuc.edu/oaisimple/uiuc_dcq.xsd • http://bolder.grainger.uiuc.edu/oaisimple/oai.asp?verb=GetRecord&identifier=oai:uiuc:184500&metadataPrefix=uiuc_dcq OAI Metadata -- Univ. of Illinois at UC

  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/datamodel/WD-dc-rdf/ OAI Metadata -- Univ. of Illinois at UC

  9. RDF, DC, DCQ, et al. Together • Simple Examples • Complex Example • RDF Visualizer OAI Metadata -- Univ. of Illinois at UC

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