New versions of the W3C RDB to RDF documents published

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In February 2012, the RDB2RDF Working Group published two Candidate Recommendations, “A Direct Mapping of Relational Data to RDF” and “R2RML: RDB to RDF Mapping Language”. Based on implementation experience, the two documents were modified to improve their compatibility and usability.

  • In the Direct Mapping:
    • The punctuation separating terms in URLs have changed to make it possible to implement the Direct Mapping in R2RML.
  • In R2RML:
  • In both documents
    • Binary data in SQL databases is expressed using xsd:hexBinary instead of xsd:base64Binary.

The documents have been published as a (2nd. Last Call) Working Draft as a result. The review period ends  on 19 June 2012. The Working Group then hopes to have sufficient implementations to transition directly from Last Call to Proposed Recommendation.

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