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Metadata Registries

Registry: authoritative, centrally controlled store of information – W3C Web Services Glossary, 2004 http://www.w3.org/TR/ws-gloss/. Metadata Registries. Primary functions. Registering Publishing Managing Data Storage User Services via a Web Interface Navigation Searching Browsing.

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Metadata Registries

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  1. Registry: authoritative, centrally controlled store of information – W3C Web Services Glossary, 2004 http://www.w3.org/TR/ws-gloss/ Metadata Registries

  2. Primary functions • Registering • Publishing • Managing • Data Storage • User Services via a Web Interface • Navigation • Searching • Browsing • M2M Services • Querying • Using an API to programmatically create, view, and modify contents • Crosslinking • Crosswalking • Schema translation And many more … …

  3. ServiceRegistries “Metadata Registries” = metadata schemas Terminology Registries /Services = Knowledge Organization Systems (KOS) = encoding schemes = code sets = valid/permissible value lists Registry Types – Perspective 1 “DataRegistries” = data standards

  4. Metadata Registries= registering metadata schemas

  5. Metadata Registries • Purpose: • to collect data related to metadata schemas • Functions: • to store data elements • include both semantics and representations • to provide the means • to identify and refer to established schemas and application profiles • to crosswalk and map among different schemas

  6. Examples: Metadata Registries • Cross-domain and cross-schema registries, • e.g., UKOLN’s SCHEMAS Registry  CORES Registry http://cores.dsd.sztaki.hu/ • JISC IE Metadata Schema Registry (IEMSR) project • Domain-specific, cross-schema registries, • e.g., UKOLN’s MEG (Metadata for Education Group) Registry • Australian Institute of Health and Welfare - Metadata Online Registry (METeOR) • Project-specific registries, • e.g. The European Library (TEL) metadata registry, whose purpose is recording all metadata activities associated with TEL • Standard-specific registries • e.g., DCMI Metadata Registry

  7. http://www.cores-eu.net/registry/ http://cores.dsd.sztaki.hu/

  8. Registry Practice 1 • Go to Cores Registry: http://cores.dsd.sztaki.hu/ • Explore: • Is a full MODS element set registered? • What elements from MODS are registered? By whom? • What elements are in the British Library Application Profile? • Is there any application profile available for postcards? • Is there an element ‘measurement’ in the registry?

  9. Metadata Registries that IncludeSchemas and relatedEncoding Schemes

  10. DCMI Open Metadata Registry http://dcmi.kc.tsukuba.ac.jp/dcregistry/navigateServlet

  11. http://dcmi.kc.tsukuba.ac.jp/dcregistry/navigateServlet

  12. Open Metadata Registry Element Sets http://metadataregistry.org/ http://metadataregistry.org/schema/list.html

  13. Value Vocabularies Concepts in a value vocabulary http://metadataregistry.org/

  14. Registry Practice 2 • Go to DCMI Registry at: http://dcmi.kc.tsukuba.ac.jp/dcregistry/navigateServlet • Choose your “Language Preference” • View ‘properties’ and explain why there are two ‘contributors’ in the registry. • Where is “hasVersion” defined? What is the namespace URI? What property does it refine? • What ‘encoding schemes’ have been registered there? • What is “IMT”? Can you find the value for jpeg 2000?

  15. http://lov.okfn.org/dataset/lov/index.html Upper & Meta Data & Systems Science Media Market Where & When City Library The LOV dataset contains the description of RDFS vocabularies or OWL ontologies defined for and used by datasets in the Linked Data Cloud.

  16. Vocabularies included And a lot more …

  17. About a vocabulary: Basic information; Relationship with others

  18. Including many ontologies, e.g., Music Ontology (MO)

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