R2RML: RDB to RDF Mapping Language

Souripriya Das, Seema Sundara, Richard Cyganiak

Souripriya Das, Seema Sundara, Richard Cyganiak, R2RML: RDB to RDF Mapping Language, World Wide Web Consortium, Working Draft WD-r2rml-20110324, March 2011.

This document describes R2RML, a language for expressing customized mappings from relational databases to RDF datasets. Such mappings provide the ability to view existing relational data in the RDF data model, expressed in a structure and target vocabulary of the mapping author's choice. R2RML mappings are themselves RDF graphs and written down in Turtle syntax. R2RML enables different types of mapping implementations: processors could, for example, offer a virtual SPARQL endpoint over the mapped relational data, or generate RDF dumps, or offer a Linked Data interface.


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