Include /codeBook/stdyDscr/citation/holdings/@URI to oai_ddi25 metadata

[cessda-bitbucket-importer]

Original report on BitBucket by Toni Sissala (GitHub: toni-sissala).

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Reporting on behalf of Katja Moilanen (FSD).

BY-COVID portal requires "The original link of the dataset in the provider’s web service, it should be a universal URL that can be used to find the original data". CDC uses DDI-C field /codeBook/stdyDscr/citation/holdings/@‌URI for this purpose (it is mandatory field), but it is missing from the CESSDA metadata aggregator. Would it be possible to have /codeBook/stdyDscr/citation/holdings/@‌URI in aggregator, once the field is mandatory for CDC and it is needed for BY-COVID project?

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[cessda-bitbucket-importer]

Original comment by Toni Sissala (GitHub: toni-sissala).

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Should be pretty straightforward since this element is included in oai_ddi25.xml template at Kuha. For some reason the source attribute (Study.study_uris) is is not included in AggOAIDDI25MetadataFormat._record_fields. See https://github.com/cessda/cessda.cdc.aggregator.oai-pmh-repo-handler/blob/main/cdcagg_oai/metadataformats.py#lines-569

[cessda-bitbucket-importer]

Original comment by Toni Sissala (GitHub: toni-sissala).

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Other missing fields:

• data_kind
• document_titles

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[cessda-bitbucket-importer]

Original comment by Toni Sissala (GitHub: toni-sissala).

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Merged in bugfix/26-missing-fields-in-oai-ddi25-metadata (pull request #30)

• Prepare 0.2.1 release

Add todays date to 0.2.1 changelog entry.

• Fixes for oai_ddi25 & oai_dc metadatas

Include fields that are supported by Kuha OAI-PMH Repo Handler for
oai_ddi25 metadata: Study.document_titles, Study.data_kinds,
Study.study_uris.

Fixes #26 at BB.

Render subject in oai_dc metadata regardless if the study.keyword does not have a value. This gets fixed by requiring Kuha OAI-PMH Repo Handler 1.0.1.

Fixes #27 at BB.

Fix nested lists in previous changelog entry.