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Metadata RegistriesMetadata Registries
Registry: authoritative, centrally controlled store of information
– W3C Web Services Glossary, 2004http://www.w3.org/TR/ws-gloss/
Primary functions
RegisteringPublishingManaging
Data StorageUser Services via a Web
InterfaceNavigationSearching Browsing
– M2M Services• Querying• Using an API to
programmatically create, view, and modify contents
– Crosslinking– Crosswalking– Schema translation
And many more … …
Registry Types – Perspective 1
“Data Registries”= data standards
“Metadata Registries”
= metadata schemas
Terminology Registries /Services
= Knowledge Organization Systems (KOS)= encoding schemes= code sets= valid/permissible value lists
Service Registries
Metadata RegistriesMetadata Registries
= registering = registering metadata schemasmetadata schemas
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
Examples:
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
Metadata Registries
http://www.cores-eu.net/registry/http://www.cores-eu.net/registry/
http://cores.dsd.sztaki.hu/
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?
Metadata Registries Metadata Registries that Includethat IncludeSchemas Schemas
and relatedand related Encoding SchemesEncoding Schemes
DCMI Open Metadata Registry
http://dcmi.kc.tsukuba.ac.jp/dcregistry/navigateServlet
http://dcmi.kc.tsukuba.ac.jp/dcregistry/navigateServlet
Open Metadata Registryhttp://metadataregistry.org/Element Sets
http://metadataregistry.org/schema/list.html
http://metadataregistry.org/
Value Vocabularies
Concepts in a value vocabulary
Registry Practice 2Go 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?
http://lov.okfn.org/dataset/lov/index.html
The LOV dataset contains the description of RDFS vocabularies or OWL ontologies defined for and used by datasets in the Linked Data Cloud.
Upper & MetaScienceData & Systems
Where & When
Media Market
LibraryCity
Vocabularies included
And a lot more …
About a vocabulary: Basic information;Relationship with others
Including many ontologies, e.g., Music Ontology (MO)