cgspace-notes/content/posts/cgcorev2-migration.md

+++ title = "CGSpace CG Core v2 Migration" date = 2019-10-28T13:27:35+02:00 description = "Possible changes to CGSpace metadata fields to align more with DC, QDC, and DCTERMS as well as CG Core v2." categories = ["Notes"] tags = ["Migration"] url = "cgspace-cgcorev2-migration"

+++

Possible changes to CGSpace metadata fields to align more with DC, QDC, and DCTERMS as well as CG Core v2.

With reference to CG Core v2 draft standard by Marie-Angélique as well as DCMI DCTERMS.

• Proposed Changes
• Fields to Create
• Fields to Delete
• Implementation Progress

Proposed Changes

As of 2019-09-11 the scope of the changes includes the following fields:

• dc.contributor.author→dcterms.creator
  • for people and institutional authors
• cg.creator.id→cg.creator.identifier
  • ORCID identifiers
• dc.title→dcterms.title
• dc.format.extent→dcterms.extent
• dc.date.issued→dcterms.issued
• dc.description.abstract→dcterms.abstract
• dc.description→dcterms.description
• dc.description.sponsorship→cg.contributor.donor
  • values from CrossRef or Grid.ac if possible
• dc.description.version→cg.peer-reviewed
• cg.fulltextstatus→cg.howpublished
  • CGSpace uses values like "Formally Published" or "Grey Literature"
• dc.identifier.citation→dcterms.bibliographicCitation
• cg.identifier.status→dcterms.accessRights
  • current values are "Open Access" and "Limited Access"
  • future values are possibly "Open" and "Restricted"?
• dc.language.iso→dcterms.language
  • current values are ISO 639-1 (aka Alpha 2)
  • future values are possibly ISO 639-3 (aka Alpha 3)?
• cg.link.reference→dcterms.relation
• dc.publisher→dcterms.publisher
• dc.relation.ispartofseries→dcterms.isPartOf
• dc.rights→dcterms.license
  • Using SPDX license identifiers if possible
• dc.source→cg.journal
• dc.subject→dcterms.subject
• dc.type→dcterms.type
• dc.identifier.isbn→cg.isbn
• dc.identifier.issn→cg.issn
• cg.identifier.dataurl→cg.hasMetadata
• dc.title.alternative→dcterms.alternative

The following fields are currently out of the scope of this migration because they are used internally by DSpace 5.x/6.x and would be difficult to change without significant modifications to the core of the code:

• dc.date.available
• dc.date.accessioned
• dc.identifier.uri
• dc.description.provenance

Fields to Create

Make sure the following fields exist:

• cg.creator.identifier (242)
• cg.contributor.donor (243)
• cg.peer-reviewed (244)
• cg.howpublished (245)
• cg.journal (246)
• cg.isbn (247)
• cg.issn (248)
• cg.hasMetadata (249)

Fields to delete

Fields to delete after migration:

• cg.creator.id
• cg.fulltextstatus
• cg.identifier.status
• cg.link.reference
• cg.identifier.dataurl

Implementation Progress

Tally of the status of the implementation of the new fields in the CGSpace 5_x-cgcorev2 branch.

Field Name	migrate-fields.sh	Input Forms	XMLUI Themes¹	dspace.cfg	Discovery	Atmire Modules	Crosswalks
dcterms.creator	✓	✓	?	✓	✓	✓
cg.creator.identifier	✓	✓	✓	-	✓	✓
dcterms.title	✓	✓	✓	✓	✓	✓
dcterms.extent	✓	✓	-	-	-	-
dcterms.issued	✓	✓	?	✓	✓	✓
dcterms.abstract	✓	✓	✓	✓	✓	-
dcterms.description	✓	✓	✓	✓	✓	✓
cg.contributor.donor	✓	✓	✓	✓	✓	✓
cg.peer-reviewed	✓	✓	✓	-	✓	-
cg.howpublished	✓	✓	-	-	-	-
dcterms.bibliographicCitation	✓	✓	✓	-	-	✓
dcterms.accessRights	✓	✓	✓	-	✓	✓
dcterms.language	✓	✓	✓	-	✓	✓
dcterms.relation	✓	✓	✓	-	-	-
dcterms.publisher	✓	✓	-	-	✓	✓
dcterms.isPartOf	✓	✓	-	✓	✓	✓
dcterms.license	✓	✓	✓	✓	✓	✓
cg.journal	✓	✓	-	-	✓	✓
dcterms.subject	✓	✓	✓	✓	✓	✓
dcterms.type	✓	✓	✓	✓	✓	✓
cg.isbn	✓	✓	-	-	-	✓
cg.issn	✓	✓	-	-	-	✓
cg.hasMetadata	✓	✓	✓	-	✓	✓
dcterms.alternative	✓	✓	-	✓	✓	✓

There are a few things that I need to check once I get a deployment of this code up and running:

• Assess the XSL changes to see if things like not(@qualifier)] still make sense after we move fields from DC to DCTERMS, as some fields will no longer have qualifiers
• Do I need to edit crosswalks that we are not using, like MODS?
• There is potentially a lot of work in the OAI metadata formats like DIM, METS, and QDC (see dspace/config/crosswalks/oai/*.xsl)

---

¹ Not committed yet because I don't want to have to make minor adjustments in multiple commits. Re-apply the gauntlet of fixes with the sed script:

$ find dspace/modules/xmlui-mirage2/src/main/webapp/themes -iname "*.xsl" -exec ./cgcore-xsl-replacements.sed {} \;