Bridge to relational databases

• Most of the data on the Web are stored in relational databases

• • “RDFying” them is not possible
  • relational databases are here to stay…

• “Bridges” are being defined:

• • a layer between RDF and the relational data
  • • RDB tables are “mapped” to RDF graphs, possibly on the fly
    • different mapping approaches are being used
  • this is what our examples did…
  • a number RDB systems offer this facility already (eg, Oracle, OpenLink, …)

• Work for a survey of mapping techniques has started at W3C