RDF data integration

RDF data integration consists to integrate some data into an RDF graph.

Systems

D2RQ

The D2RQ is an historical system for accessing relational databases as a virtual RDF graphs. The project is not maintained anymore. It is build using Jena. It has a dedicated mappings language.

Obi-Wan

Obi-Wan is the system I developed during my thesis.

RML materializers

RMLMapper

It loads all the source data in memory data.

https://github.com/RMLio/rmlmapper-java

Morph KGC

It is written in python on top of the library pandas.

FlexRML

It is written in C++, it aims at having a low memory usage https://github.com/wintechis/flex-rml

https://github.com/morph-kgc/morph-kgc

Query federation engines

HeFQUIN

It implements several physical and logical query plan optimizations. https://github.com/LiUSemWeb/HeFQUIN

Mapping language

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