Difference between revisions of "IIIF Linking Darwin Core"

Revision as of 16:57, 29 September 2022

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Many institutions publish their data to GBIF and other data aggregators using the Darwin Core metadata standard and its extensions. During the course of the project we established a convention for using the Audubon Core multimedia extension to publish IIIF manifest locations through Darwin Core. The extension is used in essentially the same way as it would be for a JPEG file. The figure below shows an example of a Audubon Core extension in a Darwin Core Archive metadata file.

<extension 
   encoding="UTF-8"
   fieldsTerminatedBy=","
   linesTerminatedBy="\n"
   fieldsEnclosedBy="""
   ignoreHeaderLines="0"
   rowType="http://rs.tdwg.org/ac/terms/Multimedia">
   <files>
      <location>darwin_core_images.csv</location>
    </files>
    <coreid index="0"/>
    <field index="1" term="http://purl.org/dc/elements/1.1/type"/>
    <field index="2" term="http://purl.org/dc/elements/1.1/format"/>
    <field index="3" term="http://rs.tdwg.org/ac/terms/accessURI"/>
    <field index="4" term="http://rs.tdwg.org/ac/terms/associatedSpecimenReference"/>
    <field index="5" term="http://purl.org/dc/terms/identifier"/>
    <field index="6" term="http://purl.org/dc/terms/description"/>
    <field index="7" term="http://ns.adobe.com/xap/1.0/rights/Owner"/>
    <field index="8" term="http://purl.org/dc/terms/rights"/>
    <field index="9" term="http://purl.org/dc/elements/1.1/rights"/>
    <field index="10" term="http://purl.org/dc/elements/1.1/creator"/>
    <field index="11" term="http://rs.tdwg.org/ac/terms/serviceExpectation"/>
</extension>

In the associated CSV file (in this case darwin_core_images.csv) the columns for the manifests would contain “application/ld+json” in the third column (dc:format), the URI of the IIIF manifest in the fourth column (ac:accessURI) and “IIIF” in the twelfth column (ac:serviceExpectation).

This can be implemented using the GBIF Integrated Publishing Toolkit. All records in the Meise Botanic Garden Herbarium that have an image of the specimen (about 1.3 M images available at the time of writing) have 2 rows in the Audubon Core extension. The first row is describing the available JPEG file, the second row is including the IIIF manifest.

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