Data Handling with Gatsby

• https://github.com/gatsbyjs/gatsby/blob/master/docs/docs/conceptual/data-fetching.md

SPARQL

See JS-Libraries

• https://comunica.dev/ (allows federated queries)
• https://zazuko.com/get-started/developers/#further-documentation-support-questions (no federated queries)

Execute SPARQL queries with @comunica/query-sparql

Federated query

npx comunica-sparql https://query.wikidata.org/sparql https://vocabs-downloads.acdh.oeaw.ac.at/vocabs-main/Humanities/TaDiRAH/tadirah.ttl -f ./data/federated-sparql.rq --log-level debug

Wikimedia Commons

• Image-URLs from Wikidata result in ❗ Das Cookie "NetworkProbeLimit" wurde abgelehnt, weil es sich in einem seitenübergreifenden Kontext befindet und sein "SameSite" auf "Lax" oder "Strict" gesetzt ist.
  • Issue: URL from Wikidata is a Redirect-URL (301) that cause the cookie issue
  • when accessing it, Wikimedia may set a session cookie that is blocked by the SameSite setting.
• Fix: Use MediaWiki-API to retrieve the images: https://www.mediawiki.org/wiki/API:Imageinfo

Credits

• Images from Commons can be used outside
• Need license requirements: https://commons.wikimedia.org/wiki/Commons:Reusing_content_outside_Wikimedia

Erros in the build-time React SSR process

Browser globals (window or document)

• add browser check during the build time to skip: https://www.gatsbyjs.com/docs/debugging-html-builds/#how-to-check-if-window-is-defined

[ARCHIV] JSON schema (for editing feature)

1. At the moment react-json-schema-from doesn't support patternProperties of Json Schema
   • see Issue on GitHub: rjsf-team/react-jsonschema-form#1514
   • that means we need a workaround here