The following demonstrators showcase the use of GraphQL to query and present data from a SPARQL enpdoint. Inspect the source code to see the underlying queries.

• A simple WikiData Movies Browser.. This is a HTML one-pager that queries the GraphQL endpoint of a demo RPT instance loaded with movies from Wikidata.

• A simple GraphQL-to-GeoJSON Demo.. This is a HTML one-pager that uses GraphQL to transform GeoSPARQL data to a customizable GeoJSON structure. It also demonstrates:
  • Ad-hoc simplification of GeoSPARQL polygons using our geof:simplifyDp extension function.
  • Use of caching cardinalities of properties across a dataset using SERVICE <cache:>, which is part of Apache Jena’s Service Enhancer extension.