Some notes on the exporting the data

• Relations form a graph

• • the nodes refer to the “real” data or contain some literal
  • how the graph is represented in machine is immaterial for now

• Data export does not necessarily mean physical conversion of the data

• • relations can be generated on-the-fly at query time
  • • via SQL “bridges”
    • scraping HTML pages
    • extracting data from Excel sheets
    • etc.

• One can export part of the data