Dataset preservation

Workflow

• Metadata ingest: Metadata will be created outside of Archivematica prior to ingest and added to the metadata folder of the transfer. See Metadata, below.
• Metadata validation: Archivematica should include a micro-service to validate metadata on ingest, using something like xmllint. Sample validation command: xmllint --schema ddi:instance:3_1 metadata/CCRI-CDN-Census1911V20110628.xml.
• Normalization:Some datasets may require manual normalization: see https://projects.artefactual.com/issues/1499.

Metadata

METS and DDI/FGDC

• DDI is Data Documentation Initiative, a metadata specification for the social and behavioral sciences; see http://www.ddialliance.org/.
• FGDC is Federal Geographic Data Committee Metadata Standard [FGDC-STD-001-1998]; see http://www.fgdc.gov/metadata/csdgm/
• DDI and FGDC are considered descriptive metadata (mdSec) in METS. From http://www.loc.gov/standards/mets/METSOverview.v2.html: "Valid values for the MDTYPE element [in mdSec] include...DDI (Data Documentation Initiative), FGDC (Federal Geographic Data Committee Metadata Standard [FGDC-STD-001-1998]."
  • In the Archivematica METS file, a DDI or FGDC file could be referenced from the mdSec using mdRef, for example as follows: <mdRef LABEL="CCRI-CDN-Census1911V20110628.xml-73b93b28-be1b-433f-861e-03bc321dfe7e" xlink:href="metadata/CCRI-CDN-Census1911V20110628.xml" MDTYPE="DDI" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>.

METS and other metadata standards

• Other metadata standards that could be used for ingested datasets include:
  • North American Profile (NAP) of ISO 19119, for geospatial metadata: http://www.fgdc.gov/metadata/geospatial-metadata-standards
  • SDMX for aggregate data: http://sdmx.org/?page_id=10
  • EML, the Ecological Metadata Language: http://knb.ecoinformatics.org/software/eml/eml-2.1.1/index.html
• If these standards are used, the mdRef in the METS file would need to use OTHER as MDTYPE, for example: <mdRef LABEL="CCRI-CDN-Census1911V20110628.xml-73b93b28-be1b-433f-861e-03bc321dfe7e" xlink:href="metadata/CCRI-CDN-Census1911V20110628.xml" MDTYPE="OTHER" OTHERMDTYPE="SDMX" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>

Hierarchical AIC/AIP structure