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Resource Discovery Metadata
The section covers resource discovery metadata including Dublin Core, Simple Dublin Core, and The IESR Metadata Schema.
Dublin Core
Standard: Dublin Core
About the Standard: Dublin Core is a metadata standard made up of three distinct components: an abstract model which describes the construction of metadata descriptions; a set of vocabularies that provide terms which are referenced in DC metadata descriptions; a set of binding specifications that describe how DC metadata descriptions may be serialised.
Version: New terms are regularly added to the metadata vocabularies maintained by DCMI, under the control of the DCMI Usage Board.
Maturity: Dublin Core has its origins in workshops held in the mid 1990s.
Risk Assessment: Dublin Core plays a key role in many development areas. It is an important standard within the context of JISC development programmes.
SOA Role: Search, Harvest.
Further Information:
- DCMI, <http://dublincore.org/>
- DCMI Abstract Model, DCMI, <http://dublincore.org/documents/abstract-model/>
- DCMI Metadata Terms, DCMI, <http://dublincore.org/documents/dcmi-terms/>
Author: Pete Johnston, UKOLN
Contributor:
Date Created: 04 Oct 2005
Update History: Initial version.
Simple Dublin Core
Standard: Simple Dublin Core
About the Standard: Simple Dublin Core is a Dublin Core Application Profile in which the properties available are the 15 elements of the Dublin Core Metadata Element Set and in which values are represented by value strings. A description set conforming to the Simple Dublin Core DCAP contains only one description; within that description, a property may be referenced in multiple statements or in none; each statement must contain a value string; value URIs and rich representations are not permitted.
Version: The Simple Dublin Core element set are stable.
Maturity: The Simple Dublin Core application profile has been widely deployed, particularly by implementers of the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH).
Risk Assessment: The Simple Dublin Core application profile supports the creation of simple metadata descriptions, and is designed primarily to support simple resource discovery functions.
SOA Role: Search, Harvest.
Further Information:
- Dublin Core Metadata Element Set, version 1.1, DCMI <http://dublincore.org/documents/dces/>
- Using Dublin Core, DCMI <http://dublincore.org/documents/usageguide/>
- Open Archives Initiative Protocol for Metadata Harvesting, Version 2.0, Open Archives Initiative, <http://www.openarchives.org/OAI/openarchivesprotocol.html>
Author: Pete Johnston, UKOLN
Contributor:
Date Created: 04 Oct 2005
- Update History:
IESR Metadata Schema
Standard: JISC Information Environment Service Registry (IESR) metadata schema for Collections, Services and Agents.
About the Standard: Within the JISC Information Environment Service Registry (IESR) collections of resources, the technical services that provide access to them and the agents that own collections or administer services are described according to the IESR Application Profile.
Version: The current version is 2.5. A new version will be produced following a metadata review now in progress (summer 2005).
Maturity: This is not a formal standard, but must be used for describing resources in IESR. The Collection description is an extension of the DCMI Collection Description schema (under development) which will also be endorsed by the NISO Metasearch Initiative, and was derived from the RSLP Collection Description Schema. The Service and Agent descriptions are bespoke but use many Dublin Core properties. Connection details for Services use and appropriate standard such as ZeeRex or WSDL.
Risk Assessment: IESR is still a development project. The metadata schema is therefore not yet stable.
SOA Role: IESR is a registry of services, thus central to SOA.
Further Information:
- IESR, <http://iesr.ac.uk/>
- Application Profile, <http://iesr.ac.uk/profile/>
Author: Ann Apps, MIMAS, The University of Manchester (ann.apps@manchester.ac.uk)
Contributor:
Date Created: 28 Jul 2005
Update History:
