Keywords: RML, RML mapper, RDF, RDF generation, R2RML, ETL
TL;DR: Position paper proposing extensions to RML that embrace source heterogeneity and improve usability and applicability.
Abstract: The RDF Mapping Language (RML) has provided a language for specifying transformation of heterogeneous structured data sources to RDF. RML was extended from R2RML, a W3C recommendation for transforming relational data to RDF, but in applying RML in practice we've identified several aspects where RML is still more table oriented, than oriented towards data format heterogeneity, limiting its potential.
In this position paper, these aspects are presented and discussed, and possible extensions to RML are proposed. In doing so, we hope to increase the usability of RML for transforming heterogeneous data sources to RDF.
Contribution: Position papers (6-8 pages)
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