Chimera

OntopSpark

OntopSpark is an Ontop's extension which supports Apache Spark as query processing engine. The Ontop platform allows to query relational databases as Virtual RDF Knowledge Graphs using SPARQL.

OntopStream

OntopStream is an Ontop's extension which supports Apache Flink as query processing engine. OntopStream allows to query Flink dynamic tables as Virtual Streaming Knowledge Graphs using RSP-QL queries.

OntopStream-TheWebConf2022Tutorial

spark-sidecar-setup

The sidecar setup container executes SparkSQL scripts against an Apache Spark instance.

chimera-suite.github.io

Chimera website.

jena-fuseki-sidecar-setup

The sidecar setup container creates a dataset in Jena Fuseki and uploads the files in the /init folder into the default graph.

jupyter-notebook

Chimera Jupyter Notebook is an extension of the juptypter/pyspark-notebook image that integrates PySPARQL

OntopSpark-evaluation

Comparison of OntopSpark and Squerall(SANSA) execution times using a dataset inspired from the BSBM benchmark

OntopStream-flink-jdbc-driver

PySPARQL

This is a simple module that allows developer to query SPARQL endpoints and analyze the results with Apache Spark.

test-spark-datatypes

Test OntopSpark's OBDA datatype conversions to be compliant with W3C standards

use-case

A step-by-step tutorial that showcases the capabilities of Chimera

infrastructure

OntopStream-evaluation

SparqlStreamWrapper

A wrapper for a remote SPARQL endpoint

thriftserver

Apache Thrift Server exposes a SparkSQL JDBC/ODBC endpoint.