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Graphs generated by the application are persisted in Apache Marmotta, a triple store that implements the Linked Data Platform 1.0 Recommendation. In our deployment, Marmotta stores its backend data in PostgreSQL, along with objects associated with ActiveRecord-based models. Krikri interacts with Marmotta through rdf-marmotta, an RDF::Repository implementation for RDF.rb.
Indexing for QA vies views is provided by Apache Solr.
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