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MongoDB Atlas runs apps anywhere
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Joseki: The Jena RDF Server.
Joseki is a server for publishing RDF models on the web. Models have URLs and they can be access by HTTP GET. Joseki is part of the Jena RDF framework.
Jena has moved to Apache: http://jena.apache.org/
Joseki is replaced by Apache Jena Fuseki.
The D2RQ API provides access to relational database content from within the Jena and Sesame RDF frameworks. D2R Server is a Semantic Web server and SPARQL endpoint based on D2RQ. Both use a declarative language for mapping database schemata to RDF.
A metadata schema registry server in Perl/C (based on RDF and Sparql/Redland), alongside a GUI client in Java/SWT with Jena for searching, browsing and creating application profiles, schemas and element sets describing resources in Dublin Core and LOM.