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Open Forum on Metadata Registeries

XML-Based Schema Languages Why, How, When?. Open Forum on Metadata Registeries. Dr Hoylen Sue DSTC Pty Ltd Resource Discovery Unit. The questions. Why? The need for schemas How? Their use When? The emerging standards. Overview. Metadata standards The big picture

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Open Forum on Metadata Registeries

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  1. XML-Based Schema Languages Why, How, When? Open Forum on Metadata Registeries Dr Hoylen Sue DSTC Pty Ltd Resource Discovery Unit

  2. The questions • Why? • The need for schemas • How? • Their use • When? • The emerging standards

  3. Overview • Metadata standards • The big picture • Deploying metadata and schemas • Metadata tools • What we have done • The issues we faced • W3C RDF efforts • The future

  4. Metadata Standards • Semantic models • How the data is modeled • Syntax • How the data is written down • Element sets • What data is captured

  5. Consensus • Semantic models • Yes • Syntax • Yes • Element sets • No!

  6. Overview • Metadata standards • The big picture • Deploying metadata and schemas • Metadata tools • What we have done • The issues we faced • W3C RDF efforts • The future

  7. Deployment Goals • Software tools • Interoperability • Semantic Interchange

  8. Solutions to the unknown • Custom developed software • Expensive • Limits deployment • Generic configurable software • Flexible • Reuse

  9. In the scheme of things Generic standards + schemas = full specification

  10. Schemas • Machine readable description • Captures metadata information • elements • qualifiers • schemes • ontologies and thesauri • constraints

  11. Overview • Metadata standards • The big picture • Deploying metadata and schemas • Metadata tools • What we have done • The issues we faced • W3C RDF efforts • The future

  12. Metadata Tools • Generation and editing • Repositories or databases • Search and processing

  13. DSTC’s Metadata suite • Editors • Reg and Reggie • Repositories • HotMeta • Search Interface • HotMeta and HotOIL

  14. Metadata Editors • Schema based • Supports multiple metadata standards • Dublin Core • ANZLIC • GILS • AGLS • EdNA • IMS • GEM • vCard • ADMIN • http://metadata.net

  15. Issues to be addressed • Inheritance and referencing • Derivative schemas • Local customizations of schemas • Site specific modifications • Application specific items • GUI elements

  16. Overview • Metadata standards • The big picture • Deploying metadata and schemas • Metadata tools • What we have done • The issues we faced • W3C RDF efforts • The future

  17. Current W3C Work • Resource Description Framework (RDF) • RDF Working groups • Model and Syntax • Schema • RDF schema working draft • XML schema work • Other proposals...

  18. Current status • XML • Syntax standard defined • Semantic smorgasbord • RDF • Model and syntax stabilizing • Schema still being developed • Communities • e.g. Dublin Core

  19. Our future work • Alignment with developing standards • Advanced constraints • Ontologies • Interoperability

  20. Conclusion • How? • Why? • When?

  21. http://metadata.net http://www.dstc.edu.au/rdu

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