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Recommendations towards “Updating the Qualified Dublin Core registry in DSpace to the latest standards of the DCMI,” a priority identified in the October 2011 community survey on improving metadata support. It also seeks to comply with the proposal to Standardize the Default Namespace. Discussion of this issue thus far is stored as a DCAT Discussion Forum topic, "Updating the Qualified Dublin Core registry in DSpace."

Glossary of Terms

• DCMIQDC
  
  • Qualified Dublin Core (QDC) standard
  DCMI
  
  • Metadata Initiative http://dublincore.org/
  • The Dublin Core Metadata Initiative
  • An organizational body governing the Dublin Core metadata standards
• DCMES
  
  • Dublin Core Metadata Element Set
• • (DCMI) manages the long term curation and development of DCMI specifications and metadata terms namespaces
• DCMI Metadata Terms
  
  • http://dublincore.org/documents/dcmi-terms/
  • Specification of all metadata terms maintained by the Dublin Core Metadata Initiative, including properties, vocabulary encoding schemes, syntax encoding schemes, and classes
• DCMES
  DCES
  
  • Dublin Core Element Set
  • Dublin Core Metadata Element Set, Version 1.1 
  • http://dublincore.org/documents/dces/
• DCTERMS
  
  • Properties in the /terms/ namespace http://dublincore.org/documents/dcmi-terms/#H2
• DC
  
  • 'Simple Dublin Core' (elements only, no qualifiers)
  • The most recent standard from the DCMI
  • Properties in the /elements/1.1/ namespace
  • http://dublincore.org/documents/dcmi-terms/#H3
  • The fifteen terms of the Dublin Core Metadata Element Set, which have also been published as IETF RFC 5013 [RFC5013], ANSI/NISO Standard Z39.85-2007 [NISOZ3985], and ISO Standard 15836:2009 [ISO15836]
  • Schema name of the DSpace metadata registry default/
  '
  • shipped with
  '
  • schema (incorrectly referred to as dcmi-terms
  
  
  • )
• QDC
  • Elements with qualifiers
  • Qualified Dublin Core (QDC)..

Main goal of these recommendations

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Possible Phases of Update

Ultimate goal = 'dcterms' schema as metadata registry default schema

Phase One: Update current default 'dc' schema in metadata registry to latest qualified Dublin Core, add 'dcterms' and 'local' as parallel schemas in registry , goal = 'dcterms' schema as metadata registry default schema
1)

• Update "dc" registry that ships with DSpace to

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• current qualified Dublin Core (QDC) standard.

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• In Phase One, name of default schema remains "dc"

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• .
  
  • Current "dc"

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• • elements are migrated to updated "

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• • dc" registry (where compliant with that standard) or pushed to "local" registry

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• Develop and implement flat "

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• dcterms" schema
• Develop and implement "local" schema
• Ship DSpace with "

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• dc," "

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• dcterms," and "local" schemas in metadata registry ("dc" remains default schema).

• Map out relationships between these three schemas

• Address all areas of code affected. Consider plugins, add-ons, interfaces, etc. as well.
• Provide tools for current DSpace repositories to migrate into these registries, if desirable (i.e. Provide tools for migrating "dc" elements not compliant with QDC to "local" registry.)

Phase Two: Plan . Map out relationships between these three registries, and establish default registry.5) Plan for migration from "QDCdc" to "DCTERMSdcterms" as default schema in DSpace metadata registry..

• Create "qdc" schema.
• Current default "dc" schema is pared down to just "dc" (the fifteen elements).
• "dcterms" is changed to default schema.
• Address all areas of code affected. Consider plugins, add-ons, interfaces, etc. as well.
• Provide tools for migration from DSpace "dc" (the qualified version) to new schemas
• DSpace ships with "dc," "qdc," dcterms," and "local"

Phase Three: Develop "dcterms6) Develop "DCTERMS" as fully functional default registry in DSpace, with range and domain values enabled and formally assigned. Provide tools for migration from "QDC."

7) Phase Four: Celebrate. 

Recommendation (tentative, pending further community and committer input)

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