BibTeX Reference for “R2RML: RDB to RDF Mapping Language”

@TechReport{Sundara:12:RRR,
  author      = "Seema Sundara and Souripriya Das and Richard Cyganiak",
  title       = "{R2RML}: {RDB} to {RDF} Mapping Language",
  month       = sep,
  note        = "https://www.w3.org/TR/2012/REC-r2rml-20120927/",
  year        = "2012",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}